尝试在不使用C++中的外部库或模块的情况下读写JSON文件

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

int main() {
    std::ifstream file("example.json");
    std::string line;
    
    if (file.is_open()) {
        while (std::getline(file, line)) {
            std::cout << line << std::endl;
        }
        file.close();
    } else {
        std::cout << "Unable to open file." << std::endl;
    }
    
    return 0;
}

#include <iostream>
#include <fstream>

int main() {
    std::ofstream file("example.json");
    
    if (file.is_open()) {
        file << "{ \"name\": \"John\", \"age\": 30, \"city\": \"New York\" }";
        file.close();
    } else {
        std::cout << "Unable to open file." << std::endl;
    }
    
    return 0;
}