// to_string example
#include <iostream>   // std::cout
#include <string>     // std::string, std::to_string

int main ()
{
  std::string pi = "pi is " + std::to_string(3.1415926);
  std::string perfect = std::to_string(1+2+4+7+14) + " is a perfect number";
  std::cout << pi << '\n';
  std::cout << perfect << '\n';
  return 0;
}

string str_val = to_string(int_val);

#include <string>

struct Student {
    std::string name;
    int age;
    double finalGrade;

    std::string toString() {
        return "Name: " + 
            name + 
            "\n Age: " + 
            std::to_string(age) + 
            "\n Final Grade: " + 
            std::to_string(finalGrade);
    }
};

#include <iostream>  
#include <boost/lexical_cast.hpp>  
using namespace std;  
int main()  
{  
 int i=11;  
 string str = boost::lexical_cast<string>(i);  
cout<<"string value of integer i is :"<<str<<"\n";  
  
}