#include <stdio.h>

int
main()
{
    int a;

    a = 42;
    printf("After 'a = %d;' we have a = %d\n", 42, a);

    ++a;
    printf("After '++a;' we have a = %d\n", a);

    a++;
    printf("After 'a++;' we have a = %d\n", a);
}