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

February 9, 2021

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.

Replace all 0’s with 1 in a given integer

Algorithm:-

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

                      int rem = num%10;

                2. Each digit is compared with 0

      1. If the digit is equal to 0 then replace it with 1

                              if(rem == 0)

                              rem = 1;

                3. Construct the new number digit by digit.

                     new=new*10+rem;

      4. Print the output.

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
coding (3)
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One comment on “C++ Program to Replace all 0’s with 1 in a given integer”


  • Roshni

    //C++ Program
    //Convert all 0’s to 1
    #include
    using namespace std;
    //main program
    int main()
    {
    int num,num2=0,i=1;
    cout<>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+rem*i;
    i *=10;
    }
    //converted number
    cout<<"Converted number is: "<<num2;
    return 0;
    }

    0