C++ Program to Replace all 0’s with 1 in a given integer

July 17, 2019

Program to Replace all 0’s with 1 in a given integer

Here we will discuss how to replace all the 0’s with 1 in a given integer using C++ programming language.

The concept is simple, find the digits of the integer. Compare each digit with 0 if the digit is equal to 0 then replace it with 1.

Construct the new integer with the replaced digits.

Working

  • User gives an input.
  • The input is stored in an int type variable say num.
  • A loop is started
    • Digits of the num is founded and stored in another variable say rem

    int rem = num%10;

    • Each digit is compared with 0
      • If the digit is equal to 0 then replace it with 1

    if(rem == 0)

                       rem = 1;

    • Construct the new number digit by digit.

    new=new*10+rem;

  • Print the output.
Replace all 0’s with 1 in a given integer

C++ Code

//C++ Program
//Convert all 0's to 1
#include<iostream>
using namespace std;
//main program
int main()
{
    int num,num2=0;
    cout<<"Enter number: ";
    //user input
    cin>>num;
    //checking for 0 input
    if(num == 0)
        num2=1;
    //converting 0 to 1
    while(num>0)
    {
        int rem = num%10;
        if(rem == 0)
            rem = 1;
        num = num/10;
        num2=num2*10+rem;
    }
    //converted number
    cout<<"Converted number is: "<<num2;
    return 0;
}

Output

Enter number: 101011
Converted number is: 111111

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