Easy Question
I'm new to C++ working on my second project. I'm working on a project that will begin with a list of items which the user is asked to pick from. Once the user enters the option, the screen is cleared and we begin a new screen. How does this work? Thanks for your replies.
Gagi
Code:int var, choice; do { cin>>choice; switch(choice) {case 1: //function one call break; ...... default: cout<<"Bad Choice, input again."; var=1 break; } }while(var);
The easiest way would be to print the available options, accompanied by a number (cout<<"1. First option \n2. Second option etc." << endl;
then ask for a choice from the user. There are different ways of doing this, you could get an input to an int, but the program would fail if you input a char, so I would take the input as a char, then when you need to use the input do something like this:
char choice;
cout << "Enter your choice";
cin >> choice;
while( choice != 49 || choice !=50 )
{
cout << "Input was invalid, enter your choice again";
cin >> choice;
}
clrscr();
switch (choice)
{
case 49://49 is 1 in ASCII
//add code for the first choice here
break;
case 50:
//second choice
break;
default:
cout << "The program should stop anything except a valid input getting to here, so this should never be seen" << endl;
break;
}
There are 'better' ways but as a beginner I found the above method relatively error proof and easy to understand.
Clearing the screen is a little bit more complicated. If you are using borland or another dos compiler #include<conio.h> and just call clrscr(); whenever you want to clear. If not this is the MSVC equivalent:
#include <windows.h>
void clrscr()
{
COORD coordScreen = { 0, 0 };
DWORD cCharsWritten;
CONSOLE_SCREEN_BUFFER_INFO csbi;
DWORD dwConSize;
HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
GetConsoleScreenBufferInfo(hConsole, &csbi);
dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
FillConsoleOutputCharacter(hConsole, TEXT(' '), dwConSize, coordScreen, &cCharsWritten);
GetConsoleScreenBufferInfo(hConsole, &csbi);
FillConsoleOutputAttribute(hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten);
SetConsoleCursorPosition(hConsole, coordScreen);
}
then call clrscr();, that's taken from the FAQ on this site, there are som eother methods there too if neither work.
I havent tried any of this yet so there might be a few errors, I havent done pure c++ for a while
Last edited by Robert602; 01-26-2002 at 04:46 PM.
