使用stringstream打印圆角浮点数

#include<iostream>
#include <sstream>
#include <iomanip>

int main() {
    float num = 3.14159265;
    std::stringstream ss;
    ss<< std::fixed<< std::setprecision(2)<< num;
    std::string result = ss.str();
    std::cout << "圆角浮点数: "<< result<< std::endl;
    return 0;
}