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Converting between int and std::string in C++

By admin | November 20, 2010

#include <iostream>
#include <sstream>
#include <cstdlib>
using namespace std;

int main() {
	// convert int to string
	int some_int = 52;
	stringstream ss;
	ss << some_int;
	string result_s;
	ss >> result_s;
	// result_s = 52
	cout << result_s << endl;

	// convert string to int
	string some_string = "1234";
	int result_i = atoi(some_string.c_str());
	// result_i = 1234
	cout << result_i << endl;
}

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Topics: Linux, Windows | 13 Comments »

13 Responses to “Converting between int and std::string in C++”

  1. Russell Says:
    September 14th, 2011 at 08:42

    What about converting from std::string back to int

  2. admin Says:
    April 28th, 2012 at 19:13

    @Russell:

    See atoi() or sscanf() in the C standard library.

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