#include <stdio.h>

int main(void)
{
  int a, b, c;

  a = b = c = 0; 
  a = 10;
  b = a * 2;

  c = a += 10; /* poor practice - have a side effect in an expression 
                  where a += 10 is the expression with a side effect */

  c = a++ + ++a; /* very poor practice - multiple side effects on the same
                    variable in an expression - different results from
                    different compilers since result is NOT defined */

  a++;      /* no real expression thus no side effects just shorthand 
               for a = a + 1;    */
  c *= 10;  /* no real expression thus no side effects just shorthand 
               for c = c * 10    */
  
  return (0);
}