Menu
Most of the places I have seen the return code values are done like this,
for success status return , #define SUCCESS 0 and other no zero numbers for all other error cases.
My question is , why we selecetd zero for SUCCESS case? Is there any specific programming best practice concerns for that?
/R
453
If a return value isn't required, declare the function to have void return type. If a return type isn't specified, the C compiler assumes a default return type of int . Many programmers use parentheses to enclose the expression argument of the return statement. However, C doesn't require the parentheses.
return 1 in the main function means that the program does not execute successfully and there is some error. return 0 means that the user-defined function is returning false. return 1 means that the user-defined function is returning true.
C provides optimized machine instructions for the given input, which increases the performance of the embedded system. Most of the high-level languages rely on libraries, hence they require more memory which is a major challenge in embedded systems.
It's an old C habit to return 0 for success and some other code for errors, so you can say:
int error = do_stuff();
if (error) {
handle_error(error);
}
However, predicates usually work the other way around, returning 1 for "success" (or true from <stdbool.h>).
155
You have to differenciate between different errors, there can be MaxInt - 1 different ones.
If 0 was an error and 1 was success, how could you tell the difference between all errors?
27
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
