11.cpp

#include<iostream>
using namespace std;
int main()
{
    //checking if number is positive or not
    int n;
    cout<<"Input a number : ";
    cin>>n;
    if(n>0)
    {
        cout<<"Number is positive!"<<endl;
    }
    else 
    {
        cout<<"Number is negative!"<<endl;
    }
    return 0;
}