Strange but true you can create functions where you pass a pointer to an error variable. error_t oops; int x = foo(10, &oops); if(oops) goto whoops;

Strange but true you can create functions where you pass a pointer to an error variable. error_t oops; int x = foo(10, &oops); if(oops) goto whoops; int x = foo(10, 0); // yolo!