Gate2017 ss Q34

34Consider the following function implemented in C:
void printxy (int x, int y) {
int *ptr;
x = 0;
ptr = &x;
y = * ptr;
* ptr = 1;
printf (“%d, %d,” x, y);
}
The output of invoking printxy (1, 1) is

Option : C
Explanation :
void printxy (int x, int y) {
int *ptr;
x = 0; // x=0,y=1
ptr = &x; // x=0,y=1, and ptr points to x
y = * ptr; //x=0, y=0
* ptr = 1; //x=1, y=0
printf (“%d, %d,” x, y); // It prints 1 AND 0.
}

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