1.1保留三位小数

#include<iostream>
#include<cmath>
#include<cstring>
#include<ctime>
#include<cstdio>
#include<iomanip>
#include<queue>
using namespace std;
int main()
{
    double a;
    cin>>a;
    printf("%0.3f",a);
    return 0;




}

 

转载于:https://www.cnblogs.com/lipeiyi520/p/8231478.html