code to check whether it's an positive, negative or zero number in C++ (Mistakes to AVOID!!)

 #include <iostream>

using namespace std;

int main(){

    int num;

    cout << "enter a number : ";

    cin >> num;

    switch(num) {

        case '+': cout << "it is a positive number" << num << endl;

        break;

        case '-': cout << "it is a negative number" << num << endl;

        break;

        case '0': cout << "it's a zero" << num << endl;

        break;

        default: cout << " please enter a valid number ";

        break;

    }

    return 0;

}

MISTAKES I DID:-

Issues in your code:

1. Switch case mistake: You used characters ('+', '-', '0') instead of checking number values

2. Logic error: Switch cases don’t work for checking positive/negative numbers (better use if-else).

3. #include <iostream>

   using namespace std;

   
   

   int main() {

       int num;

      

       // Getting user input

       cout << "Enter a number: ";

       cin >> num;

   
   

       // Checking conditions

       if (num > 0) { // checks if num is +ve

           cout << "It is a positive number." << endl;

       }

       else if (num < 0) { // checks if num is -ve

           cout << "It is a negative number." << endl;

       }

       else { // checks if num is zero

           cout << "It is zero." << endl;

       }

   
   

       return 0;

   }