UVA - 11984 - A Change in Thermal Unit

#include <stdio.h>

int main()
{
    int x,y,cases,i;
    double ansf=0;
    scanf("%d",&cases);
    for(i=0;i<cases;i++){
        scanf("%d %d",&x,&y);
        printf("Case %d: %.2f\n",i+1,x+5.0*y/9.0);
    }
    return 0;
}