GATE CS 2022 Set 1 — Question 21
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Programming & Data Structures → C Programming → Arrays & Strings in C
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Question
What is printed by the following ANSI C program?
#include<stdio.h>
int main(int argc, char *argv[])
{
int x = 1, z[2] = {10, 11};
int *p = NULL;
p = &x;
*p = 10;
p = &z[1];
*(&z[0] + 1) += 3;
printf("%d, %d, %d\n", x, z[0], z[1]);
return 0;
}
Correct answer
(D) 10, 10, 14
Solution
Let's trace the program execution:
Thus, the output is
1.
int x = 1, z[2] = {10, 11}; initializes .2.
p = &x; makes pointer point to .3.
*p = 10; changes the value of to 10.4.
p = &z[1]; makes pointer point to .5.
*(&z[0] + 1) += 3; &z[0]is the address of the first element of array .&z[0] + 1is the address of the second element, which is&z[1].*(&z[0] + 1)is the value at that address, which is .z[1] += 3;updates from 11 to .
printf("%d, %d, %d\n", x, z[0], z[1]); prints the current values: .Thus, the output is
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