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Editorial Team
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Asked: 2026-05-14T04:55:08+00:00

main() { char a,b,c; a=6; b=-5; c = a+b ; printf (%d %d %d

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main()
{
char a,b,c;
a=6;
b=-5;
c = a+b ;
printf (“%d %d %d \n” , a, b,c ) ;
}

Here , what actually happens 

00000110
10000101 
--------
10000111
--------
So values c will -11 , then how come it is 1.
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1 Answer

  1. Editorial Team

    Your error is: -5 in two’s complement is not 10000101. In 32-bit it is: 11111111111111111111111111111011

    6, is:

    00000000000000000000000000000110

    The sum is:

      11111111111111111111111111111011
+ 00000000000000000000000000000110
  --------------------------------
  00000000000000000000000000000001

    I recommend you read this Wikipedia page about signed number representation. Modern CPUs use two’s complement.

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