Problem with a piece of code in C

[ayushgoel]

I was solving the problem HAMSTER1 using C. After reading the comments,(and actually getting WA ) i shifted from float to double for the problem. But to my dismay, the code has started playing with me.. . The code is:

#include<math.h>
#include<stdio.h>
int main() {
    double th,r,h,k1,k2;
    int n,v;
    scanf("%d",&n);
    while(n--){
        scanf("%d%f%f",&v,&k1,&k2);
        //code
        printf("%.3f\n",th);
    }
    return 0;
}

It's output for sample prob is:

3
10 10 0
0.785 10.000 2.500 -26843545600.000
10 0 10
0.785 10.000 2.500 -26843545600.000
10 10 10
0.785 10.000 2.500 -26843545600.000

Can someone help me defeat my C compiler..!?

[leppyr64]

Do you really want to do double calculations with ints? Don't you want to cast them to double? Check the spec for printf. Doubles are %lf.

[ayushgoel]

Thanks leppy.. Now i understand! I was also thinking the same but in some books I found float could be printed and scanned by %e (exponent form),%f (real form) ,%g ( some rounded integer form).. It was similar for double too, so I got confused..!