Tässä osassa käsitellään kahden tai useamman merkkijonon ketjuttamista C++-ohjelmointikielessä. Merkkijonon ketjutus tarkoittaa merkkiryhmää, joka yhdistää kaksi muuta merkkijonoa palauttaakseen ketjutetun yksittäisen merkkijonon. Kun merkkijonoja ketjutetaan, toinen merkkijono lisätään ensimmäisen merkkijonon loppuun yhdeksi merkkijonoksi.
Esimerkiksi meillä on kaksi merkkijonoa, ' Java ' ja ' Tpoint ', ja haluamme ketjuttaa yhden merkkijonon muodossa Java + Tpoint = JavaTpoint.
Keskustellaan erilaisista tavoista ketjuttaa annettu merkkijono C++-ohjelmointikielellä.
- Liitä kaksi merkkijonoa käyttämällä for-silmukkaa
- Yhdistä kaksi merkkijonoa while-silmukalla
- Liitä kaksi merkkijonoa käyttämällä +-operaattoria
- Liitä kaksi merkkijonoa strcat()-funktiolla
- Liitä kaksi merkkijonoa käyttämällä append()-funktiota
- Yhdistä kaksi merkkijonoa käyttämällä periytymistä
- Liitä kaksi merkkijonoa kaverifunktiolla ja strcat()-funktiolla
Ohjelma ketjuttaa kaksi merkkijonoa käyttämällä for-silmukkaa
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä for-silmukalla C++-ohjelmointiin.
Program.cpp
java tostring -menetelmä
#include using namespace std; int main () { string str1, str2, result; // declare string variables int i; cout <> str1; // take string cout <> str2; // take second string // use for loop to enter the characters of the str1 into result string for ( i = 0; i <str1.size(); i++) { result="result" + str1[i]; add character of the str1 into } use for loop to enter characters str2 string ( i="0;" < str2.size(); str2[i]; cout << ' concatenation and is <<result; return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The Concatenation of the string Java and Tpoint is JavaTpoint </pre> <h3>Program to concatenate two strings using while loop</h3> <p>Let's consider an example to combine two strings using a while loop in C++ programming.</p> <p> <strong>Program2.cpp</strong> </p> <pre> #include using namespace std; int main () { // declare and initialize the string char str1[100] = ' We Love'; char str2[100] = ' C++ Programming Language'; int i, j; // declare variable cout << ' The first string is: ' << str1 << endl; cout << ' The second string is: '<< str2 <<endl; for (i="0;" str1[i] !=" " ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << ' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic '+'operator that simply adds two strings to return a new concatenated string.</p> <p>Let's consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<' is: ' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << ' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<'
the concatenated string is: ' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<' 100 enter the first string: '; cin.getline (st, 100); take a line of string with limit cout <<' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated ' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></'></pre></'></pre></str1></pre></'></pre></endl;></pre></str1.size();> Ohjelma ketjuttaa kaksi merkkijonoa while-silmukalla
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä while-silmukalla C++-ohjelmoinnissa.
Ohjelma2.cpp
#include using namespace std; int main () { // declare and initialize the string char str1[100] = ' We Love'; char str2[100] = ' C++ Programming Language'; int i, j; // declare variable cout << ' The first string is: ' << str1 << endl; cout << ' The second string is: '<< str2 <<endl; for (i="0;" str1[i] !=" " ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << \' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic '+'operator that simply adds two strings to return a new concatenated string.</p> <p>Let's consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'></pre></endl;> Ohjelma ketjuttaa kaksi merkkijonoa käyttämällä +-operaattoria C++:ssa
+ Operaattori: Se on aritmeettinen '+'-operaattori, joka yksinkertaisesti lisää kaksi merkkijonoa palauttaakseen uuden ketjutetun merkkijonon.
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä käyttämällä +-operaattoria C++-ohjelmoinnissa.
Ohjelma3.cpp
#include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'> Ohjelma ketjuttaa kaksi merkkijonoa strcat()-menetelmällä
strcat()-funktio: Strcat on merkkijonoluokan sisäänrakennettu funktio, joka lisää kaksi merkkijonoa palauttaakseen ketjutetun merkkijonon.
Syntaksi
strcat ( char *arr1, char *arr2)
Yllä olevassa syntaksissa on kaksi merkkijonoa, arr1 ja arr2, jotka kulkivat strcat()-funktion sisällä palauttaakseen ketjutetun merkkijonon.
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä strcat()-funktiolla C++-ohjelmoinnissa.
Ohjelma4.cpp
#include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1> Ohjelma ketjuttaa kaksi merkkijonoa append-funktiolla
append()-funktio: An liitä() funktio on ennalta määritetty kirjastofunktio, jota käytetään lisäämään tai lisäämään toinen merkkijono ensimmäisen merkkijonon loppuun palauttamaan yksi merkkijono.
Syntaksi
str1.append(str2);
Yllä olevassa syntaksissa str2 on toinen merkkijono, joka välitetään append()-funktiossa, joka lisää str2-merkkijonon str1-merkkijonon loppuun.
lataa youtube-videoita vlc
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä append()-funktiolla C++-ohjelmoinnissa.
Program5.cpp
#include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } Lähtö
Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends!
Ohjelma ketjuttaa kaksi merkkijonoa käyttämällä luokan periytymistä
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä käyttämällä perinnöllistä C++-ohjelmointia.
Ohjelma6.cpp
#include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'> Ohjelma ketjuttaa kaksi merkkijonoa ystäväfunktiolla ja strcat()-funktiolla
Tarkastellaan esimerkkiä kahden merkkijonon yhdistämisestä kaverifunktiolla ja strcat()-funktiolla C++-ohjelmoinnissa.
Ohjelma7.cpp
#include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\\' 100 enter the first string: \\'; cin.getline (st, 100); take a line of string with limit cout <<\\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \\' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\\'>