Can someone please help me out here. I've got an assignment to finish up on C++ and it just doesn't run properly. its a care hiring program that asks for details and prints it out at the end. when i enter my house number, address, and phone number it just goes loco. Help will be greatly appreciated. here's the code:

#include <iostream>
#include <cstdlib>
#include <string>
#include <cmath>
void line ();
using namespace std;

// Declarations
float price;
float cost;
char choice;
char option;
int numdays;



// Function for car choice
void carchoice ()
{
do { // Start of loop

cout << "\n\t\t\t\tCARS FOR HIRE\n\n\n\tProduct Code\t\tItem Description\tCost Per Day\n";
line ();
cout << "\n\n\tA\t\t\tNissan\t\t\t$7.00\t\t";

cout << "\n\n\tB\t\t\tFord Focus\t\t$7.00\t\t";

cout << "\n\n\tC\t\t\tPeugeot 107\t\t$9.00\t\t";

cout << "\n\n\tD\t\t\tVolvo V40\t\t$7.00\t\t";

cout << "\n\n\tE\t\t\tVolksWagon\t\t$7.50\t\t";


cout << "\n\n\n\tEnter choice of vehicle you wish to hire. (A, B, C, D or E):";
cin >> choice;

// Switch case statement
switch (choice)
{
case 'A':
case 'a':
cout<< "\n\tYou selected Nissan\n\t" << endl;
price = 7.00;
break;
case 'B':
case 'b':
cout<< "\n\tYou selected Ford Focus\n\t" << endl;
price = 7.00;
break;
case 'C':
case 'c':
cout<< "\n\tYou selected Peugeot 107\n\t" << endl;
price = 9.00;
break;
case 'D':
case 'd':
cout<< "\n\tYou selected Volvo V40\n\t" << endl;
price = 7.00;
break;
case 'E':
case 'e':
cout<< "\n\tYou selected VolksWagon\n\t" << endl;
price = 7.50;
break;
default:
cout << "\n\tThe choice of vehicle can not be found!\n\t"<<endl;
break;
}

cout << "\tEnter number of days you wish to hire it for. ";
cin >> numdays;

cost = price*numdays;

cout << "\n\tThe cost of hire for this car is "<<char(156)<< cost << endl;
cout << "\n\tDo you wish to hire this car at this rate? (Y/N): ";
cin >> option;

system ("cls");
// Entry of neither "y" or "Y" will initiate loop
}while (option != 'Y' && option != 'y');

system("cls");
cin.get();
}

// function for entry of customer details
void customerdetails (char name[],char surname[],int addressn,
char adres[],char PNum[])
{
cout << "\nEnter first name: "; //Print out
cin >> name; // input
cout << "\nEnter surname name: ";
cin >> surname;
cout << "\nEnter house number: ";
cin >> addressn;
cout << "\nEnter your address: ";
cin >> adres;
cout << "\nPlease enter Phone Number: ";
cin >> PNum;
cout << "\n\tYour invoice will now be displayed\n"<< endl;
system("pause");
}

// Main Function
int main ()
{
using namespace std;

char name[50], surname[50], adres[50], PNum[50];
int addressn;

system ("color f6"); // System Colour


carchoice (); // Call up carchoice function#


cout << "\n\t\t\tHire and Personal Details Form\t\t\n\n";

// Call up customer details function
customerdetails (name,surname,addressn,adres,PNum);

system("cls");
cin.get();

// Display invoice
cout << "\n\n\t======================================================="<< endl;

cout << "\n\t\t\tInvoice Details" << endl;

cout << "\n\n\tCustomer Name: "<< name <<" "<< surname << endl;

cout << "\n\n\tVehicle Type: ";
//If,else statement to display the the car that user has selected in the invoice
if (choice == 'a' || choice == 'A' )
{ cout << "Nissan" << endl; }

else if ( choice == 'b' || choice == 'B' )
{ cout << "Ford Focus" << endl; }

else if ( choice == 'c' || choice == 'C')
{ cout << "Peugeot 107" << endl; }

else if ( choice == 'd' || choice == 'D')
{ cout << "Volvo V40" << endl; }

else if ( choice == 'e' || choice == 'E')
{ cout << "VolksWagon" << endl; }

cout << "\n\n\tNumber of days: "<< numdays << endl;

cout << "\n\n\tRental Cost: "<< cost << endl;

cout << "\n\n\tHome Address: "<< addressn <<" "<< adres << endl;

cout << "\n\n\tPhone Number: "<< PNum << endl;

cout << "\n\n\t======================================================="<< endl;

cin.ignore();
return 0;
}
void line()
{
for(int i=1; i < 41; i++)
cout <<"__";}