#include <stdio.h>
int
main (void)
{
int a, b, c;
a = 10; b = 20;
/* b is 20 so -b is -20 */
b = -b + a;
/* with multiple similar unary operators, use parentheses *//* do you understand why c is 30? */
c = -b - (-a) + -b;
printf ("The value of b is %d ", b);
printf ("and the value of c is %d\n", c);
return (0);
}
