如何在C++中对小数为N的分数进行字符串化

#include <iostream>
#include <sstream>

std::string decimalToString(double number) {
    std::stringstream ss;
    ss << number;
    return ss.str();
}

int main() {
    double decimal = 3.14159;
    std::string str = decimalToString(decimal);
    std::cout << str << std::endl;  // 输出 "3.14159"
    return 0;
}

#include <iostream>
#include <string>

int main() {
    double decimal = 3.14159;
    std::string str = std::to_string(decimal);
    std::cout << str << std::endl;  // 输出 "3.14159"
    return 0;
}