¿como identifico si un bloque va a terminar en devuelve 0 o en 1?

Question

¿como identifico si un bloque va a terminar en devuelve 0 o en 1? ademas ¿ es necesario poner devuelve 0 ? si no porque :D

Answer 1

Code 1 means that your program terminated with an error state.
Code 0 means that your program terminated correctly.
You should use 1 in the main return statement only for debugging purposes and never leave it in the finished project.
To find out if your code will end up in code 1 or 0 prior to execution you should carefully analize the logic flow diagram of your code.