Will the program compile successfully? #include int main() { #ifdef NOTE int a; a=10; #else int a; a=20; #endif printf("%d ", a); return 0; }

Question

Will the program compile successfully? #include<stdio.h>

int main()
{
    #ifdef NOTE
        int a;
        a=10;
    #else
        int a;
        a=20;
    #endif
    printf("%d
", a);
    return 0;
}

Accepted Answer

Yes, this program will compile and run successfully and prints 20. The macro #ifdef NOTE evaluates the given expression to 1. If satisfied it executes the #ifdef block statements. Here #ifdef condition fails because the Macro NOTE is nowhere declare…

Will the program compile successfully? #include int main() { #ifdef NOTE int a; a=10; #else int a; a=20; #endif printf("%d\n", a); return 0; }

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