05:输出保留12位小数的浮点数

Posted 2020-10-02

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<algorithm>
#include<cstring>
using namespace std;

int main()
{double a;
 cin>>a;
printf("%0.12lf",a);
return 0;
}