string addition c++ code example

Example 1: c++ append a char to a string

// string::operator+=
#include <iostream>
#include <string>

int main ()
{
  std::string name ("John");
  std::string family ("Smith");
  name += " K. ";         // c-string
  name += family;         // string
  name += '\n';           // character

  std::cout << name;
  return 0;
}

Example 2: c++ string concatenation

string first_name = "foo"
string last_name = "bar"
std::cout << first_name + " " + last_name << std::endl;

Example 3: how to merge string array in C++

For string concatenation in C++, you should use the + operator. std::string nametext = "Your name is " + name; where operator + serves to concatenate strings. nametext is an std::string but these do not have the stream insertion operator ( << ) like output streams do.