H friends,
As we know, a function returns a value and that value is saved somwhere. like
Code:
int Sum( int x, int y )
{
return x + y;
}
Total = Sum( 10, 20 );
The value 30 is saved in variable Total.
Now the question is, what int value does the function main return, and where is it saved. And can we see the value of the integer returned by main.
Please explain by the help of a small program.
Thank you very much!
Moderator's Comments:
114 posts and no code tags?!...
Hi,
In Unix, the main function can usually return any int value as its status, which is captured by the OS. You can always see the return value of any program by simply doing echo $?
For example,
Code:
int main()
{
return 5;
}
Check it
Code:
echo $?
5
It doesnt make a lot of sense here, but when the code throws exceptions like for example dereferencing an invalid pointer, or invalid airthmetic operation (divide by 0) etc, then the OS terminates the process and the return value would describe the type of error encountered.
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11-06-2012
