Bahsa C++ fungsi String Join, Length, Replace, Copy

Menghitung jumlah karakter String:

#include <iostream>

#include <string>

int main ()

{

  std::string str ("Test string");

  std::cout << "The size of str is " << str.length() << " bytes.\n";

  return 0;

}

Merubah karakter String:

#include <iostream>

#include <string>

int main ()

{

  std::string base="this is a test string.";

  std::string str2="n example";

  std::string str3="sample phrase";

  std::string str4="useful.";

  // replace signatures used in the same order as described above:

  // Using positions:                 0123456789*123456789*12345

  std::string str=base;           // "this is a test string."

  str.replace(9,5,str2);          // "this is an example string." (1)

  str.replace(19,6,str3,7,6);     // "this is an example phrase." (2)

  str.replace(8,10,"just a");     // "this is just a phrase."     (3)

  str.replace(8,6,"a shorty",7);  // "this is a short phrase."    (4)

  str.replace(22,1,3,'!');        // "this is a short phrase!!!"  (5)

  // Using iterators:                                               0123456789*123456789*

  str.replace(str.begin(),str.end()-3,str3);                    // "sample phrase!!!"      (1)

  str.replace(str.begin(),str.begin()+6,"replace");             // "replace phrase!!!"     (3)

  str.replace(str.begin()+8,str.begin()+14,"is coolness",7);    // "replace is cool!!!"    (4)

  str.replace(str.begin()+12,str.end()-4,4,'o');                // "replace is cooool!!!"  (5)

  str.replace(str.begin()+11,str.end(),str4.begin(),str4.end());// "replace is useful."    (6)

  std::cout << str << '\n';

  return 0;

}

Mencetak Array to String

#include <iostream>

using namespace std;

int main ()

{

   char greeting[6] = {'H', 'e', 'l', 'l', 'o', '\0'};

   cout << "Greeting message: ";

   cout << greeting << endl;

   return 0;

}

JOIN array dalam contoh (strcpy atau strcat):
#include <iostream>

#include <cstring>

using namespace std;

int main ()

{

   char str1[10] = "Hello";

   char str2[10] = "World";

   char str3[10];

   int  len ;

   // copy str1 into str3

   strcpy( str3, str1);

   cout << "strcpy( str3, str1) : " << str3 << endl;

   // concatenates str1 and str2

   strcat( str1, str2);

   cout << "strcat( str1, str2): " << str1 << endl;

   // total lenghth of str1 after concatenation

   len = strlen(str1);

   cout << "strlen(str1) : " << len << endl;

   return 0;

}

//Greeting message: Hello

HASIL SAAT DI PLAY:

strcpy( str3, str1) : Hello

strcat( str1, str2): HelloWorld

strlen(str1) : 10

JOIN array dalam contoh (+):

#include <iostream>

#include <string>

using namespace std;

int main ()

{

   string str1 = "Hello";

   string str2 = "World";

   string str3;

   int  len ;

   // copy str1 into str3

   str3 = str1;

   cout << "str3 : " << str3 << endl;

   // concatenates str1 and str2

   str3 = str1 + str2;

   cout << "str1 + str2 : " << str3 << endl;

   // total lenghth of str3 after concatenation

   len = str3.size();

   cout << "str3.size() :  " << len << endl;

   return 0;

}

Hasil saat di Play:

str3 : Hello

str1 + str2 : HelloWorld

str3.size() :  10