#include<cstdio>
#include<iostream>
using namespace std;
int main()
{
    double a,b,c;
    cin>>a>>b;
    c=a/b;
    printf("%.9lf",c);
}

制作不易，点个赞再拿走嘛

#include<bits/stdc++.h> using namespace std; int main() { double a,b,c; cin >> a >> b ; c=a/b; printf("%.9lf",c); return 0; }

#include #include using namespace std; int main() { double a,b,c; cin>>a>>b; c=a/b; printf("%.9lf",c); }

#include<bits/stdc++.h> using namespace std; int main() { double a,b,c; cin>>a>>b; c=a/b; printf("%.9lf",c); return 0; }

#include #include using namespace std;

int main(int argc, char** argv) { int a,b; cin>>a>>b; double result = a*1.0/b; cout<<fixed<<setprecision(9)<<result; return 0; }