C :

#include<stdio.h>
int main()
{
    double s1,s2,s3,s;
    int T,i,j,n;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%lf%lf%lf",&s1,&s2,&s3);
        s=s1/12*360+s2/60/12*360+s3/3600/12*360;
        printf("%.5lf\n",s);
    }
}

C++ :

#include <stdio.h>

int main()
{
    int h,m,s,T;
    //freopen("c.in","r",stdin);
    //freopen("c.out","w",stdout);
    double anglePerSec=360.0/(60*60*12);
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d%d",&h,&m,&s);
        printf("%.5lf\n",(s+60*m+60*60*h)*anglePerSec);
    }
    return 0;
}