How do I deal with floats in my int based text menu

[hoobledooble]

I'm writing a menu that will present you with 5 choices over and over again until you enter 5 as your input to leave. My code deals with string inputs and such but when I enter a float number the program rounds it, stores it as an int, and does the loop a couple times in a weird way! Please help. I need to know how to deal with float inputs in my UI

  #include "GameClass.h"
#include <iostream>
#include <string>

using namespace std;

int main()
{
	cout<<"This application stores a list of board games in stock for Wildcats Store."<<endl;
	int choice = 0;
	while(choice != 5)
	{
		cout<<"Select from:"<<endl;
		cout<<"1.Insert a game record"<<endl;
		cout<<"2.Delete a game record"<<endl;
		cout<<"3.Print the game list"<<endl;
		cout<<"4.Search the game list"<<endl;
		cout<<"5.Quit"<<endl;
		cin>>choice;
		if (cin.fail())
		{
			cout<<"Sorry, that wasn't a valid input! Please enter an option 1,2,3,4,5"<<endl;
			cin.clear();
			string tempstr;
			cin>>tempstr;
		}
		else
		{
			//Choice 1:Insert game record into the game list
			if (choice == 1)
			{
			}
			//Choice 2:Delete game specified by the user from the game list
			if (choice == 2)
			{
			}
			//Print all the games and their information in Lexogaphical order
			if (choice == 3)
			{
			}
			//Search the directory for a game mathing search key supplied by the user
			if (choice == 4)
			{
			}
		}
	}
	cout<<"Thank you for visiting the Wildcat Store!"<<endl;
	system("pause");
	return 0;
}

[JLBorges]

#include <iostream>

int get_int( int minv, int maxv )
{
    std::string input ;
    // http://en.cppreference.com/w/cpp/string/basic_string/getline
    std::getline( std::cin, input ) ; // read in a complete line

    try // try to parse it as an int
    {
        std::size_t pos = 0 ;
        // http://en.cppreference.com/w/cpp/string/basic_string/stol
        const int result = std::stoi( input, &pos ) ;
        if( pos == input.size() && result >= minv && result <= maxv ) return result ; // fully parsed
    }
    catch( const std::exception& ) {}

    std::cout << "that wasn't a valid input!. please enter a number in [" << minv << ',' << maxv << "]\n" ;
    return get_int( minv, maxv ) ;
}

int main()
{
    int choice = 0 ;
    while( choice != 5 )
    {
        std::cout << "Select from:\n"
                     "1.Insert a game record\n"
                     "2.Delete a game record\n"
                     "3.Print the game list\n"
                     "4.Search the game list\n"
                     "5.Quit\n" ;

        choice = get_int( 1, 5 ) ;
        std::cout << "\nyou chose " << choice << "\n\n" ;
    }
}

[Chervil]

when I enter a float number the program rounds it, stores it as an int

Not quite. When a floating-point value is entered, the program reads only as far as the decimal point. Thus it truncates, rather than rounds the value. But the important part is that everything else from the decimal point onwards remains in the input buffer, and is picked up by the next cin statement.

Whether the user's input is valid or not, you need to empty the buffer.
You can do that by using ignore().
cin.ignore(1000, '\n');
is probably adequate, though a more general case is to use
std::cin.ignore( std::numeric_limits<std::streamsize>::max(), '\n' );
You'll need to #include <limits> for that.


This will read and discard eveything up to and including the newline character.

[hoobledooble]

Thank you all for the input, much appreciated