#include <stdio.h>
#include <sys/types.h>
int main(int argc, char** argv)
{
    int a =42;
    int b=7;
    int c=777;
    int *t=&a;
    int *u=NULL;
    printf("%d %d\n",a,*t);

    c=b;
    u=t;
    printf("%d %d\n",c,*u);

    a=8;
    b=8;
    printf("%d %d %d %d\n", b,c,*t,*u);
    *t=123;
    *t=c;
    printf("%d %d %d %d\n", b,c,*t,*u);

	return 0;
}