c++ - 32 bit negative Integer Overflow

Question

Why making an int -2147483648 to positive overflow int.

int x = -2147483648;
int num;
if(x<0)
{
   num = -x; //overflow here
}

For ex:below both x and y are same.

int x = -2147483648;
cout<<x<<endl;
int y = -x;
cout<<x<<endl;

Output:
-2147483648
-2147483648

question from:https://stackoverflow.com/questions/65873222/32-bit-negative-integer-overflow

Answer 1

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