Preprocessor Directive MCQ 1 : Pre Incrementing Macro

Guess What will be the output of following Code Snippet -

#include<stdio.h>
#define MAX 10
int main(){
    int num;
    num = ++MAX;
    printf("%d",num);
    return 0;
}
No Options
A 10
B 11
C Compile Error
D Run Time Error
Output of the Above Program

Explanation : 

num = ++MAX;
will be expanded as -
num = ++10;
    = Compile Error
  1. Macro Preprocessor only replaces occurance of macro symbol with macro symbol value
  2. Preprocessor replace MAX with 10.

Expanded Program :

int main(){
    int num;
    num = ++10;
    printf("%d",num);
    return 0;
}
  1. Above expanded code is now given to compiler
  2. Compiler will throw error : Lvalue Require Error. (because Increment Operator and Decrement Operators should be used with variable)