GATE EXAM PREPARATION IN "C" - (GATE CS 2000)

The value of j at the end of the execution of the following C program. 

int incr (int i) {    static int count = 0;    count = count + i;    return (count); } main () {    int i,j;    for (i = 0; i <=4; i++)       j = incr(i); } (a) 10 (b) 4 (c) 6 (d) 7 Answer (a) Explanation: count is static variable in incr(). Statement static int count = 0 will assign count to 0 only in first call. Other calls to this function will take the old values of count. Count will become 0 after the call incr(0) Count will become 1 after the call incr(1) Count will become 3 after the call incr(2) Count will become 6 after the call incr(3) Count will become 10 after the call incr(4)