menu.cpp

#include<iostream>
#include<cstdlib> //system
using namespace std;
float calculateArea(float l, float w);
void area();
void baydin();
void menu();
int main()
{
    while (1)
    {
        system("cls");
        menu();
    }
    return 0;
}


void menu()
{
    int ans = -999;
    cout << "Menu System" << endl;
    cout << "=============" << endl;
    cout << "1 - Baydin" << endl;
    cout << "2 - Calculate Area " << endl;
    cout << "3 - Exit Program" << endl;
    cout << "Please choose 1,2,3: ";
    cin >> ans;
    switch (ans)
    {
    case 1: baydin(); break;
    case 2: area();  break;
    case 3: exit(0); break;
    default: break;
    }
}

void area()
{
    float length = 0.0F;
    float width = 0.0F;
    float area = 0.0F;
    cout << "Enter Length ";
    cin >> length;
    cout << " Enter Width ";
    cin >> width;
    area = calculateArea(length, width);
    cout << "The area is " << area << endl;
    system("pause");
}

float calculateArea(float l, float w)
{
    return w * l;
}

void baydin()
{
    string name = "";
    int sum = 0;
    int luck = -999;

    cout << "Please Enter Your Name: ";
    cin >> name;
    for (char ch : name)
    {
        sum += int(ch);
    }
    luck = sum % 3;
    if (luck == 0)
    {
        cout << "bad" << endl;
    }
    if (luck == 1)
    {
        cout << "normal" << endl;
    }
    if (luck == 2)
    {
        cout << "excellent" << endl;
    }
    system("pause");
}