Question

How to use #if conditional evaluation in C

Answer 1

#include <stdio.h>
 
#define VAL 3
 
int main(void)
{
    #if !defined(VALLLL) && (VAL < 10 * 3)
        printf("yes < 10 * 3\n");
    #endif
    
    return 0;
}

 
/*
run:

yes < 10 * 3

*/

 

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