What is the output of the following C program? #include int main(void) { printf("%d %d\n", (16 & 15) == 0, (18 & 17) == 0); return 0; }

Bitwise Operators · Predict the Output · Question 9

Power-of-two check n & (n - 1) – output Answer, explanation & discussion

Output
Easy
0 comments
Answer explained
Moderated community

Question 9 Back to Exercise

What is the output of the following C program?

main.c

#include <stdio.h>

int main(void) {
    printf("%d %d\n", (16 & 15) == 0, (18 & 17) == 0);
    return 0;
}

A 1 0 Correct
B 0 1
C 1 1
D 0 0

Correct Answer: Option A

16 = 10000 and 15 = 01111 share no bits, so the AND is 0: a power of two. 18 = 10010 and 17 = 10001 share the top bit (16), so 18 is not a power of two.

Output Right-shifting a negative number with GCC/Clang
Output C23 binary literals with &, | and ^ – output
Output Output of 6 & 3, 6 | 3 and 6 ^ 3 in C
Output Output of left and right shifts in C
Output Output of ~x and ~x + 1 for a signed int
Output Precedence trap: if (x & 1 == 0) – output

Discussion & Comments 0

Share your method, a shortcut, or ask about a step you didn't follow.

No comments yet. Be the first to share your solution!

Power-of-two check n & (n - 1) – output Answer, explanation & discussion

More Bitwise Operators practice questions

Discussion & Comments 0

Post your comment