How can I get what my main function has returned?

Question

In a C program if we want to give some input from terminal then we can give it by:

int main(int argc, char *argv[])

In the same way, if we

Answer 1

You can get the exit values with the command basic linux command echo $? The error codes are standard and the details are explained in this link

The general codes are

**

0- success

1- general errors

126- permission issue

127-Illegal command

128-Invalid arguments and fatal errors

255-Out of range**