Consider the C program shown below. (GATE CS 2003)

# include <stdio.h> # define print(x)  printf ("%d", x) int x; void Q(int z) {   z += x;   print(z); } void P(int *y) {   int x = *y+2;   Q(x);   *y = x-1;   print(x); }   main(void) {   x=5;   P(&x);   print(x);   getchar(); }

The output of this program is
a) 1276
b) 22 12 11
c) 14 6 6
d) 766

Answer (a)

Note that main() and Q() are accessing the global variable x. Inside P(), pointer variable y also holds address of global variable x, but x in P() is its P’s own local variable.