Question

Consider the following function

void find (int x)
{
int i, j;
for (i = 0, j =0; i <2, j <4; i++, j++);
x = i + j *x;
printf("%d", x);
}
What will be the output of find (2)?

• A. 12
• B. 16
• C. 6
• D. 8

Answer 1

The correct option is A 12

$\underset{–}{find\left(2\right)}:$
i = 0, j = 0 $\Rightarrow$ 0 < 2, 0 < 4
i = 1, j = 1 $\Rightarrow$ 1 < 2, 1 < 4
$\text{i = 2, j = 2}\Rightarrow \text{2 < 2, 2 < 4 (only 2 < 4 considered)}$
i = 3, j = 3 $\Rightarrow$ 3 < 3, 3 < 4
$\text{i = 0, j = 4}\Rightarrow \text{4 < 3, 4 < 4 (now 4 < 4 fails)}$

After loop termination, i = 4, j = 4
x = i +j *x $\Rightarrow$ x = 4 + 4 * 2
$\Rightarrow$ x = 12
12 will be printed by the given function.