Programming logic puzzle


What will be the output of the following program?

int main() {

union {

int i;

int j;

void f() {

printf("i=%d, j=%d\n", i, j);



i = 3;

j = i+++ ++i;


return 0;


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  • 3 Answer(s)

    Error message….

    dyj Expert Answered on 5th August 2016.
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    i+++ at line 20 is not executable.
    pardon me if I am wrong.

    Shubham Patra Guru Answered on 15th August 2016.
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    i = 5, j = 8

    This statement,: j = i+++ ++, i is actually

    j = i++ + ++i;

    i = 3 at first, then starting from left we look at i++, so the expression takes the values as 3 because i++ is a post-increment and afterwards increments i to 4. Then it looks at the other part of the expression which is ++i so for this it does a pre-increment and i becomes 5 and then 3 + 5 is added together and assigned to j.

    radkan Scholar Answered on 29th March 2017.
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