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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.        int num = -21;
  6.        int twos_complement = -num+ 1;
  7.        int twos_complement2 = -num;
  8.  
  9.        std::cout << "n = " << num << std::endl;
  10.        std::cout << "2's complement = " << twos_complement << std::endl; 
  11.        std::cout << "2's complement(2) = " << twos_complement2 << std::endl;
  12.  
  13. 	return 0;
  14. }
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin 
Standard input is empty
stdout 
n = -21
2's complement = 22
2's complement(2) = 21
https://ideone.com/z5SQve
language:
C++ (gcc 8.3)
created:
12 days ago
visibility:
public

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