Arithmetic Operators Problem!

Question

int a,b;
long c,d;
a=12345;
b=234567;
c=a*b/b;
d=(long)a*b/b;
the Result:
c= -5965
d= 12345
why ?

Answer 1

Please see the expression broken into smaller expressions
int a,b;
long c,d;
a=12345;
b=234567;
c=a*b/b;
int temp1 = a*b; // here we can expect lossed values in temp1
int temp2 = temp1 / b; // temp1 already corrupted
c = temp2 ;
// So instead do casting here
c = (long)a*b/b; // Good luck
d=(long)a*b/b;
the Result:
c= -5965
d= 12345
why ?