#include <iostream>
#include <string>
using namespace std;

void hello();
string myLine();
string myLine(int);
string myLine(int ,char);
bool isEven(int);

int main(){
    string line = "\n";
    line += myLine(80,'=');
    line += "\n";
    hello();
    cout << endl<<myLine(20)<<endl;
    hello();
    cout<<line;
    hello();
    cout<<line;
    hello();
    cout <<endl;
    myLine();
    myLine(10);
}

bool isEven(int num){
    return num%2 != 0 || num == 0;
    
}
void hello(){
    cout<<"Hello World";
}

string myLine()
{
    return "\n**********\n";
}

string myLine(int n)
{
    /*
   string line = "";
   for(int i = 0; i < n;i++)
      line += '*';
   return line;   
   */

   return myLine(10,'*');
}

string myLine(int n,char ch)
{
   string line = "";
   for(int i = 0; i < n;i++)
      line += ch;
   return line;   
}