Conditional Compilation #if #elif #endif

 //**conditional compilation**

//we use # before if because it is a macro defination program 

//and we use #endif to end the #if statement 

//their is no need of pare of parenthesis in if statement bcoz it work on macro


#include <stdio.h>

#include <stdlib.h>

#define INDIA 1 

#define PAKISTAN 2

#define USA 3 

#define ISRAIL 4

#define COUNTRY INDIA

#define AGE 19

int main()

{

    

printf("code for the universe\n");

#if COUNTRY == INDIA

printf("code for the indians\n");

#if AGE >= 18

printf("you are eligible for this code\n");

#endif 




#elif COUNTRY == USA

printf("code for the USA\n");

#if AGE >= 18

printf("you are eligible for this code\n");

#endif



#elif COUNTRY == PAK

printf("code for the pak\n");

#if AGE >= 18

printf("you are eligible for this code\n");

#endif


#else 

printf(" code for other country except india usa and pak\n");


#endif 

    return 0;

}

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