Whats wrong with my code? Please help!

#include

int main()

{

//variables

int m1, m2, m3;

int a1, a2, a3;

int f1, f2, f3;

//input acceleration

printf("Enter value for a1: ");

printf("Enter value for a2: ");

printf("Enter value for a3: ");

scanf("%d %d %d",&a1,&a2,&a3);

//input mass

printf("Enter value for m1: ");

printf("Enter value for m2: ");

printf("Enter value for m3: ");

scanf("%d %d %d",&m1,&m2,&m3);

//functions

f1=m1*a1;

m1=f1/a1;

a1=f1/m1;

f2=m2*a2;

m2=f2/a2;

a2=f2/m2;

f3=m3*a3;

m3=f3/a3;

a3=f3/m3;

//command:

printf("f1=%d , m1=%d , a1=%d ");

printf("f2=%d , m2=%d , a2=%d ");

printf("f3=%d , m3=%d , a3=%d ");

return 0;

}