uva problem 11984 A Change in Thermal Unit solution

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    float c,d;
    float ans;
    scanf("%d", &t);
    for(int i=1;i<=t;i++){
        scanf("%f%f", &c, &d);


        ans=(5*d)/9;
        ans=ans+c;
        printf("Case %d: %0.2f\n",i,ans);
    }
    return 0;
}