Will the program compile successfully? #include<stdio.h> int main() { #ifdef NOTE int a; a=10; #else int a; a=20; #endif printf("%d\n", a); return 0; } ?->(Show Answer!)

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

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By: guest on 01 Jun 2017 06.00 pm

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 declared. Hence the #else block gets executed, the variable a is declared and assigned a value of 20. printf("%d\n", a); It prints the value of variable a 20.

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