C | Loops & Control Structure | Question 2
#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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