#include #include #include int main(int argc, char *argv[]) { char *ptr; if(argc < 3) { printf("Usage: %s \n", argv[0]); exit(0); } ptr = getenv(argv[1]); if(ptr == NULL) { printf("%s doesn't exist", argv[1]); return -1; } ptr += (strlen(argv[0]) - strlen(argv[2]))*2; printf("%s is at %p\n", argv[1], ptr); return 0; }