C interview question 5

What will the output of the given code?

#include<stdio.h>

void main ()

{

int a=3;

a = ++a + ++a;

printf ("a=%d",a);

}

Ans:10

Reason:

Here pre-increment operator is used so the value of a is increased to 4 again another pre-increment operator which increases the value of a to 5 , then the value of a is added and assigned to a .

a    =   ++a    +    ++a;

  a=3

 ++a=4

 ++a=5

 a = 5 + 5;

 a = 10;