join string in c++ code example

Example 1: concat string in c++

#include <iostream>
#include <sstream>

int main() {
  std::string value = "Hello, " + "world!";
  std::cout << value << std::endl;

  //Or you can use ostringstream and use integers too
  //For example:

  std::ostringstream ss;
  ss << "This is an integer" << 104;
  std::cout << ss.str() << std::endl;
}

Example 2: c++ string concatenation

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

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Java Example