RUN
C C++ JAVA PYTHON SQL HTML CSS DSA Robotics AWS CODING INTERVIEW PREPARATION

Made with  & Code # Program to find one’s complement of a binary number in C++

Written By -

Problem –  Binary Number as a string, we have to print its 1’s complement.

1’s complement of a binary number is another binary number obtained by transforming all the 0 bit to 1 and the 1 bit to 0.

Example:

Input: 101010

One’s complement the number: 010101

### Algorithm:

1. Take binary number input as string having length say size.
2. Initialize int fail=0.
3. Start loop from i=0 to i<size
if binary[i]==1then comp[i]=0

else if binary[i]==0

then comp[i]=1

else

print “error! Enter binary number of assigned size”

fail=1

break

4. Put null character in the string complement

comp[size] = ‘\0’

5. If fail ==0 then print the ones complement.

### Code:

``````//Program to find one's complement of a binary number

#include <iostream>
#define size 6
using namespace std;

int main(){

int i, fail = 0;

char binary[size + 1], comp[size + 1];

cout << " Input a "<<size <<" bit binary number: ";

cin >> binary;

for (i = 0; i < size; i++) {

if (binary[i] == '1') {

comp[i] = '0';

}

else if (binary[i] == '0') {

comp[i] = '1';

} else {
cout << "Error! Input the number of assigned bits." << endl;

fail = 1;

break;

}

}

comp[size] = '\0';

if (fail == 0){

cout << "The original binary number = " << binary << endl;

cout << "Ones complement the number = " << comp << endl;

}

}``````