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C | Loops & Control Structure | Question 2

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C

#include <stdio.h>
#define PRINT(i, limit) do \\
                        { \\
                            if (i++ < limit) \\
                            { \\
                                printf(\"GeeksQuiz\\n\"); \\
                                continue; \\
                            } \\
                        }while(0);
 
int main()
{
    int i = 0;
    PRINT(i, 3);
    return 0;
}

                    

How many times GeeksQuiz is printed in the above program ?
 

(A)

1
 

(B)

3
 

(C)

4
 

(D)

Compile-time error
 



Answer: (A)

Explanation:

If a macro needs to be expanded in multiple lines, it is the best practice to write those lines within do{ }while(0) to avoid macro side effects. After GeeksQuiz is printed once, the control reaches the while statement to check for the condition. Since, the condition is false, the loop gets terminated.
 



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Last Updated : 12 Jan, 2013
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