Can someone explain #pragma warn directive in c with example?

Answer 1

In c there are many warning messages which can be on or off with help of #pragma warn.

Syntax:

#pragma warn +xxx
#pragma warn –xxx
#pragma warn .xxx

Where
+ means on
- means off
. means on/off (toggle)

xxx is indicate particular warning code in three alphabet. Example: rvl is warning code which means function should return a value.

#include<stdio.h>
#pragma warn –rvl
int main(){
    printf("It will not show any warning message");
    return 0;
}

Output: It will not show any warning message

When you will execute the above program then compiler will not show the warning message function should return a value because rvl warning
is off.