#define FALSE -1 #define TRUE 1 #define NULL 0

#define FALSE -1

    #define TRUE   1

    #define NULL   0

    main() {

       if(NULL)

         puts("NULL");

       else if(FALSE)

         puts("TRUE");

       else

         puts("FALSE");

       }

Answer:

TRUE

Explanation:

The input program to the compiler after processing by the preprocessor is,

    main(){

         if(0)

             puts("NULL");

    else if(-1)

             puts("TRUE");

    else

             puts("FALSE");

         }

Preprocessor doesn't replace the values given inside the double quotes. The check by if condition is boolean value false so it goes to else. In second if -1 is boolean value true hence "TRUE" is printed.

Blog Author: Vijay Kumar

Go to: Java Aptitude