Question

Write a C++ program to prompt a user for a positive integer and print the number of even and odd digits (0 is even). Sample run:

Enter a positive integer: -4580

Invalid.

Enter a positive integer: 12146

2 odd digits

3 even digits

Answer 1

Code:

#include <iostream>

using namespace std;

int main() {

cout<<"Enter a positive integer:";

int r=0,even=0,odd=0;

cin>>r;

while(r<0){

cout<<"Invalid"<<endl;

cout<<"Enter a positive integer:";

cin>>r;

}

while(r>0){

int c=r%10;

if(c%2==0)even++;

else if(c%2==1)odd++;

r=r/10;

}

cout<<odd<<" odd digits"<<endl;

cout<<even<<" even digits"<<endl;

}

Output:

Enter a positive integer:-4580
Invalid
Enter a positive integer:12146
2 odd digits
3 even digits