Code

 Header...
// Demonstrate inadvertant integer division

 int main(){
   ... 

»  int j, k;
»  double x;

  // Simple division of two integer:
»  x=7/3;
»  printf("x: %g\n", x);

  // Same but with variables:
»  j=7;
»  k=3;
»  x=j/k;
»  printf("x: %g\n", x);
 
  // More-complicated case:

»  x=1.14159265358979+j/k;
»  printf("x: %g\n", x);

  // The reverse just throws away the fraction:
»  k=x;
»  printf("k: %d\n", k);

  // See what happens when we put "3.0":
»  x=7/3.0;
»  printf("x: %g\n", x);

»  return 0;
}