fmt 库 c++

#include <iostream>#include <fmt/core.h>
int main() {    int age = 20;    std::string name = "Alice";    double price = 12.34;    bool flag = true;
    // 格式化输出到控制台    fmt::print("My name is {}, I'm {} years old.\n", name, age);    fmt::print("The price is {:.2f}, the flag is {}.\n", price, flag);
    // 返回格式化后的字符串    std::string s = fmt::format("My name is {}, I'm {} years old.", name, age);    std::cout << s << std::endl;
    return 0;}