C | Operators | Question 5

C

#include <stdio.h>
int main()
{
    int i = 3;
    printf(\"%d\", (++i)++);
    return 0;
}

What is the output of the above program?

(A)

3

(B)

4

(C)

5

(D)

Compile-time error

Answer: (D)

Explanation:

In C, prefix and postfix operators need l-value to perform operation and return r-value. The expression (++i)++ when executed increments the value of variable i(i is a l-value) and returns r-value. The compiler generates the error(l-value required) when it tries to post-incremeny the value of a r-value.

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