#include <stdlib.h> #include <unistd.h> #include <stdio.h> int I_global = 25; int main(int argc, char **argv) { int *pointer_to_int; printf("address of I_global is %p\n",&I_global); pointer_to_int = &I_global; printf("contents of pointer_to_int are %p\n",pointer_to_int); *pointer_to_int = *pointer_to_int + 10; printf("the contents of I_global are %d\n",I_global); return(0); }