oprator

Question

int main()
{
unsigned int x = 1;
printf("Signed Result %d \n", ~x);
printf("Unsigned Result %ud \n", ~x);
return 0;

}

some one give detailed answer ...

(mainly how it works )

Answer 1

Output:-

Signed Result = -2

Unsigned Result = (4294967294)₁₀

Explanation:-

Now, x = 1 in decimal 

and in binary 0000 0000 0000 0000 0000 0000 0000 0001

operator ~ is complement of given number.

1's complement of x = 1 --->>> 1111 1111 1111 1111 1111 1111 1111 1110

and its unsigned value is = 4294967294

For signed value use 2's complement notation. Computers uses 2's complement to represent negative numbers.

1111 1111 1111 1111 1111 1111 1111 1110  Representing in 2's complement notation gives -2.

Comments

@ Shubhanshu

u mean unsigned number always takes 1's complement representation

and signed number always takes 2's complement

for a -ve number representation??

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@srestha

C only follows 2's complement representation, it depends on signed or unsigned how that value to be treated...