Question

How to use stringstream with insertion (<<) and extraction (>>) operators in C++

Answer 1

#include <iostream>  
#include <sstream> 

int main() {  
    std::stringstream ss;
    
    ss << "c++"; 
    std::cout << "ss: " << ss.str() << "\n";
    
    ss.str("programming"); 
    std::cout << "ss: " << ss.str() << "\n";

    std::stringstream ss1;

    ss << "java php";
    
    std::string s1;
    ss >> s1;
    
    std::string s2;
    ss >> s2;
    
    std::cout << "s1: " << s1 << "\n";
    std::cout << "s2: " << s2 << "\n";
    std::cout << "ss: " << ss.str() << "\n";
    
    std::stringstream().swap(ss);
    ss << "abc";
    ss >> s1;
    std::cout << "ss: " << ss.str() << "\n";
    std::cout << "s1: " << s1 << "\n";

    return 0;
}  




/*
run:

ss: c++
ss: programming
s1: java
s2: phping
ss: java phping
ss: abc
s1: abc

*/

 

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