Foro de elhacker.net

#include <iostream>
#include <string>
using namespace std;
#include <cctype>
#include <iomanip>
 
int menu();
double cost(int descPercentage, double total, double final, double amountDisc, double amountVAT);
 
        int main() {	
	int option;
	int units;
	int readCost;
	int readMenu;
	int descPercentage;
	const int VAT = 21;
	const int DISCOUNT = 15;
	double price;
	double total;
	double readcost;
	double final;
	double amountDisc;
	double amountVAT;
        bool sale = false;
	bool client = false;
	char discount;
	string product;
	string name, nif, address;
 
	cout << "1. Client Data" << endl;
	cout << "2. Sale Data" << endl;
	cout << "3. Invoice" << endl;
	cout << "4. Totals" << endl;
	cout << "5. Restart" << endl;
	cout << "0. Exit" << endl;
	cout << "Option: ";
	cin >> option;
	cout << endl;
	switch (option) {
		case 1:
			if (client == false) {
				cout << "Client Name: ";
				cin.sync();
				getline (cin, name);
				cout << "Client NIF: ";
				getline (cin, nif);
				cout << "Client Address: ";
				getline (cin, address);
				cout << client;
				cout << endl;
			}
		case 2:
			if (sale == true) {
				readMenu = menu();
				cout << "Product Name: ";
				cin.sync();
				getline (cin, product);
				cout << "Product Price: ";
				cin >> price;
				cout << "Discount (y/n): ";
				cin >> discount;
				discount = toupper(discount);	
				if (discount == 'Y') {
					descPercentage = DISCOUNT;
				}
				else {
					descPercentage = 0;
				}
				cout << "Units: ";
				cin >> units;				
				sale = true;
				cout << sale;
				cout << endl;
			}
			else if (sale != false){
				cout << "No sale data!" << endl;
				cout << endl;
				readMenu = menu();
			}
		case 3:
			if (client == false) {
				cout << "No client data!" << endl;
				cout << endl;
				readMenu = menu();
				client = false;
				cout << client;
			}
			else {	
				readMenu = menu ();
				cout << endl << "Invoice:" << endl;
				cout << setw(50) << right << name << endl;	
				cout << setw(50) << right << nif << endl;
				cout << setw(50) << right << address << endl << endl;
				readMenu = menu ();
				client = true;
				cout << client;
				}
	              case 4:
			if (sale == false) {					
				cout << "No sale data!" << endl;
				cout << "1. Client Data" << endl;
				cout << "2. Sale Data" << endl;
				cout << "3. Invoice" << endl;
				cout << "4. Totals" << endl;
				cout << "5. Restart" << endl;
				cout << "0. Exit" << endl;
				cout << "Option: ";
				cin >> option;
				sale = false;
				cout << sale;
			}
			else {
			readcost = cost(descPercentage, total, final, amountDisc, amountVAT);
			cout << "Product: " << product << endl;
			cout << setw(40) << left << "Unit Price";
			cout << setw(10) << right << fixed << setprecision(2) << price << endl;
			cout << setw(40) << left << "Units";
			cout << setw(7) << right << units << endl;
			cout << setw(40) << left << "Total";
			cout << setw(10) << right << fixed << setprecision(2) << total << endl;
			cout << setw(40) << left << "Discount";
			cout << setw(7) << right << descPercentage << " %" << endl;
			cout << setw(50) << right << fixed << setprecision(2) << -amountDisc << endl;
			cout << setw(40) << left << "Total after discount";
			cout << setw(10) << right << fixed << setprecision(2) << total << endl;
			cout << setw(40) << left << "VAT";
			cout << setw(7) << right << VAT << " %" << endl;
			cout << setw(50) << right << fixed << setprecision(2) << amountVAT << endl;
			cout << setw(40) << left << "Final Price";
			cout << setw(10) << right << fixed << setprecision(2) << final << endl;
			sale = true;
			cout << sale;
		}
		case 5:
			system ("CLS");
			break;
		default:
			cout << "1. Client Data" << endl;
			cout << "2. Sale Data" << endl;
			cout << "3. Invoice" << endl;
			cout << "4. Totals" << endl;
			cout << "5. Restart" << endl;
			cout << "0. Exit" << endl;
			cout << "Option: ";
			cin >> option;
			cout << endl;
}
	return 0;
}
 
      int menu() {
 
	int option;
	int readMenu;
 
	cout << "1. Client Data" << endl;
	cout << "2. Sale Data" << endl;
	cout << "3. Invoice" << endl;
	cout << "4. Totals" << endl;
	cout << "5. Restart" << endl;
	cout << "0. Exit" << endl;
	cout << "Option: ";
	cin >> option;
	cout << endl;
	 while (option <= -1 || option >= 6) {
	 	cout << "1. Client Data" << endl;
		cout << "2. Sale Data" << endl;
		cout << "3. Invoice" << endl;
		cout << "4. Totals" << endl;
		cout << "5. Restart" << endl;
		cout << "0. Exit" << endl;
		cout << "Option: ";
		cin >> option;
		cout << endl;
	 }
	return option;
}
double cost(int descPercentage, double total, double final, double amountDisc, double amountVAT) {
	const int VAT = 21;
	const double DISCOUNT = 15;
	char discount;
 
	amountDisc = total * descPercentage / 100;
	total = total - amountDisc;
	amountVAT = total * VAT / 100;
	final = total + amountVAT;
 
	return final;
}
 

int main()
{
	mis variables...
	do{
		system("cls");
		cout<<"1. Primera opcion"<<endl;
		cout<<"2. Segunda opcion"<<endl;
		cout<<"3. ...."<<endl;
		cout<<"4. .."<<endl;
		cout<<"5. Salir"<<endl;
		cin>>opcion;
		switch(opcion){
			case 1: hacer_cosas();break;
			case 2: hacer_cosas();break;
			case 3: hacer_cosas();break;
			case 4: hacer_cosas();break;
			case 5: cout<<"FIN DEL PROGRAMA"<<endl;break;
			default: cout<<"Opcion incorrecta"<<endl;
		}
		system("pause");
	}while(opcion!=5);
}