void main(){
    int a = 0;
    char* b = &a;
    printf("%d\n",a);
    b[0] = 1;
    printf("%d\n",a);
    b[1] = 2;
    printf("%d\n",a);
    b[2] = 3;
    printf("%d\n",a);
    b[3] = 4;
    printf("%d\n",a);
}
//http://codepad.org/BSUdGDt2