C++ String Streams Output

Introduction

To make the output more readable, we can insert text between the variables:

#include <iostream> 
#include <sstream> 

int main() //from w w w . j  a  v a 2s.  c o m
{ 
    char c = 'A'; 
    int x = 123; 
    double d = 456.78; 
    std::stringstream ss; 
    ss << "The char is: " << c << ", int is: "<< x << " and double is: " << d; 
    std::cout << ss.str(); 
}

To output data from a stream into an object, we use the >> operator:

#include <iostream> 
#include <sstream> 
#include <string> 

int main() /*from  ww  w  .j a  v a2  s .  c om*/
{ 
    std::string s = "A 123 456.78"; 
    std::stringstream ss{ s }; 
    char c; 
    int x; 
    double d; 
    ss >> c >> x >> d; 
    std::cout << c << ' ' << x << ' ' << d << ' '; 
}

This example reads/outputs data from a string stream into our variables.

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