Can someone help??

I just started learning C++ and I'm writing a simple program for class. We were supposed to write a C++ program that displays a title, "Currency Conversion" and then writes the names of five currencies and their equivalents to a US Dollar. The conversions are hard-coded equations. I had no problem with this, but then my instructor wanted the class to expand the "Currency Conversion" program to accept as input, one currency that is error checked as a valid entry and then display its equivalency in US Dollars. That's where I had problems. Below is what I have, please keep it basic, and any help is appreciated. Right now all I get is the countries listed, and when you pick a country and press enter the program closes instead of showing the conversion for that country.......

Thanks


#include <iostream> //include code from the file iostream
#include <fstream.h> // file I/O
#include <iomanip.h> // format manipulation

using namespace std;


int main()

{


int numinput;
int countrynum;




cout << "***** Money Conversion *****\n\n";

cout << "1. Japanese Yen\n";
cout << "2. Euro\n";
cout << "3. Swiss Franc\n";
cout << "4. Canadian Dollar\n";
cout << "5. British Pounds\n\n\n";


cout << "Choose a number from 1 to 5 for that country's conversion" << endl;
cin >> numinput;

cin >> countrynum

cin>> countrynum = 1
cout << numinput*111.7850 << endl;
if countrynum = 2
cout << numinput*0.8371 << endl;
if countrynum = 3
cout << numinput*1.2975 << endl;
if countrynum = 4
cout << numinput*1.2422 << endl;
if countrynum = 5
cout << numinput*0.5659 << endl;



cin.get();

return 0;

}

" I had no problem with this, but then my instructor wanted the class to expand the "Currency Conversion" program to accept as input, one currency that is error checked as a valid entry"

Can you explain what you mean by an input and what the error checking concerns?

Actually, I' really not that concerned withe the error checking right now. What I want should happen is when you enter the number of one of the countries you should get the currency conversion for that country ie.......

1 Japanese Yen = 111.7850 U.S Dollar

1 Euro = 0.8371 U.S Dollar

1 Swiss Franc = 1.2975 U.S Dollar

1 Canadian Dollar = 1.2422 U.S Dollar

1 British Pound = 0.5659 U.S Dollar


right now when you compile and run this it closes when you pick a country number and hit enter...........

change

"cin >> countrynum

cin>> countrynum = 1"

to
"cin >> countrynum;"

Prompt the user for the country first. Do you know case statements? I prefer it to a bunch of nested if statements.

I think ur instructor means you to write the menu driven program which means that if user enters 6(ur option is from 1 to 5) then u have to tell the user this is invalid choice and for currency if user enter any invalid symbols like letters and otehr symbols then u must check for that also, and i think u can do it with ascii codes.