Quiz about C Macro & Preprocessor

Question 1

C

#include <stdio.h>
#define PRINT(i, limit) do \\
                        { \\
                            if (i++ < limit) \\
                            { \\
                                printf("GeeksQuiz\\n"); \\
                                continue; \\
                            } \\
                        }while(1)

int main()
{
    PRINT(0, 3);
    return 0;
}

How many times GeeksQuiz is printed in the above program?

1
3
4
Compile-time error

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Question 2

What is the output of following program?

C

#include <stdio.h>
#define macro(n, a, i, m) m##a##i##n
#define MAIN macro(n, a, i, m)

int MAIN()
{
    printf("GeeksQuiz");
    return 0;
}

Compiler Error
GeeksQuiz
MAIN
main

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Question 3

C

#include <stdio.h>
#define X 3
#if !X
    printf("Geeks");
#else
    printf("Quiz");
 
#endif
int main()
{
        return 0;
}

Geeks
Quiz
Compiler Error
Runtime Error

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Question 4

C

#include <stdio.h>
#define ISEQUAL(X, Y) X == Y
int main()
{
    #if ISEQUAL(X, 0)
        printf("Geeks");
    #else
        printf("Quiz");
    #endif
    return 0;
}

Output of the above program?

Geeks
Quiz
Any of Geeks or Quiz
Compile time error

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Question 5

C

#include <stdio.h>
#define square(x) x*x
int main()
{
  int x;
  x = 36/square(6);
  printf("%d", x);
  return 0;
}

1
36
0
Compiler Error

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Question 6

Output?

C

# include <stdio.h>
# define scanf  "%s Geeks Quiz "
int main()
{
   printf(scanf, scanf);
   return 0;
}

Compiler Error
%s Geeks Quiz
Geeks Quiz
%s Geeks Quiz Geeks Quiz

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Question 7

C

#include <stdio.h>
#define a 10
int main()
{
  printf("%d ",a);

  #define a 50

  printf("%d ",a);
  return 0;
}

Compiler Error
10 50
50 50
10 10

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Question 8

Output?

C

#include<stdio.h> 
#define f(g,g2) g##g2 
int main() 
{ 
   int var12 = 100; 
   printf("%d", f(var,12)); 
   return 0; 
}

100
Compiler Error
0
1

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Question 9

Predict the output of following program?

C

#include <stdio.h>
#define MAX 1000
int main()
{
   int MAX = 100;
   printf("%d ", MAX);
   return 0;
}

1000
100
Compiler Error
Garbage Value

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Question 10

Output of following C program?

C

#include<stdio.h>
#define max abc
#define abc 100

int main()
{
    printf("maximum is %d", max);
    return 0;
}

maximum is 100
abcimum is 100
100imum is 100
abcimum is abc

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