How to read a json file into a C++ string

Question

My code like this:

std::istringstream file("res/date.json");
std::ostringstream tmp;
tmp<<file.rdbuf();
std::string s = tmp.str();
std::cout<<s<<std::endl;

The output is res/date.json, while what I really want is the whole content of this json file.

Answer 1

Load a .json file into an std::string and write it to the console:

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

int main(int, char**) {

    std::ifstream myFile("res/date.json");
    std::ostringstream tmp;
    tmp << myFile.rdbuf();
    std::string s = tmp.str();
    std::cout << s << std::endl;

    return 0;
}