Corresponding Value of Signed Unsigned

    #include<stdio.h>

    int main()

{

    int a=-5;

    unsigned int b=-5u;

    if(a==b)

         printf("Avatar");

    else

         printf("Alien");
    return 0;

}

Output: Avatar

Explanation: int a=-5;

Here variable a is by default signed int.

unsigned int b=-5u;

Constant -5u will convert into unsigned int. Its corresponding unsigned int value will be :

65536 – 5 + 1= 65532

So, b = 65532

In any binary operation of dissimilar data type for example: a == b

Lower data type operand always automatically type casted into the operand of higher data type before performing the operation and result will be higher data type.

In c signed int is higher data type than unsigned int. So variable ‘b’ will automatically type casted into signed int.

So corresponding signed value of 65532 is -5

Hence, a==b

Blog Author: Vijay Kumar

Go to: Java Aptitude