Jose Luis Landivar - 7 months ago 32

C++ Question

I'm new into programing. I'm working on a program that will tell the odd and even numbers that are less or equal to the user's input (for inputs >=0). How do I make the program run if value is >=0 and ask for the input again if the value is <0.

Here is the program:

`> #include <iostream>`

using namespace std;

int main() {

cout << "Please enter only a positive value\n";

// Get number from user

int input = 0;

cout << "Enter a number:\n";

cin >> input;

int number = 1;

while (input >= 0 && number <= input) {

// Print some numbers

cout << "Here are some odd numbers:\n";

while (number <= input) {

cout << number << endl;

number = number + 2;

}

// Print some numbers

cout << "Here are some even numbers:\n";

int number2 = 0;

while (number2 <= input) {

cout << number2 << endl;

number2 = number2 + 2;

}

}

return 0;

}

Answer

Correct code:

```
#include <iostream>
using namespace std;
int main() {
cout << "Please enter only a positive value\n";
// Get number from user
int input = 0;
cout << "Enter a number:\n";
cin >> input;
while (input < 0) {
cout << "Input is negative. Enter again: \n";
cin >> input;
}
int number = 1;
while (input >= 0 && number <= input) {
// Print some numbers
cout << "Here are some odd numbers:\n";
while (number <= input) {
cout << number << endl;
number = number + 2;
}
// Print some numbers
cout << "Here are some even numbers:\n";
int number2 = 0;
while (number2 <= input) {
cout << number2 << endl;
number2 = number2 + 2;
}
}
return 0;
}
```

Note that I added this chunk:

```
while (input < 0) {
cout << "Input is negative. Enter again: \n";
cin >> input;
}
```

to handle negative inputs.