Answer to Question #251354 in C++ for mHm

Question

Write a program that reads a 4 digit (or fewer) positive integer and determines

how many digits in the integer are equal to the last character of your Roll number,

and prints the result on the screen. If a user enters a negative integer or an

integer greater than 4 digits, print a message on the screen: “Invalid integer!

Execute program again and enter a valid integer.” Also, write the pseudocode for

this program.

Answer 1

#include <iostream>
using namespace std;
 
int count_digit(int num)
{
    int cnt = 0;
    while (num != 0){
        num = num / 10;
        cnt++;
    }
    return cnt;
}
 
int main()
{
    int num;
    while(true){
        cout<<"\nEnter a 4 digit (or fewer) positive integer: ";
        cin>>num;
        int num_digits=count_digit(num);
        if(num_digits<=4 && num>0){
            cout<<num;
            break;
        }
        else{
            cout<<"\nInvalid integer!";
        }
    }
    
    cout << "\nNumber of digits : " << count_digit(num);
    return 0;
}