What I am getting is
gcc -o check -Wall -Wextra gauss2.c GENER01.c check.c -lm
gauss2.c: In function ‘gauss2’:
gauss2.c:8: warning: unused variable ‘temp’
check.c:13: warning: return type defaults to ‘int’
check.c: In function ‘main’:
check.c:22: warning: implicit declaration of function ‘settable’
check.c:30: warning: control reaches end of non-void function
Maybe you should simply copy the code here...
> gauss2.c:8: warning: unused variable ‘temp’
So delete it then, if you're not using it
> check.c:13: warning: return type defaults to ‘int’
So make it explicitly return int, rather than being vague about it.
> check.c:22: warning: implicit declaration of function ‘settable’
So declare it already!
> check.c:30: warning: control reaches end of non-void function
So look where you're returning, and make sure every path has a value.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
