small problem with "cin"

[hca]

I am in a c++ class and I am having a problem with part of my program. The code is as follows:
#include <iostream.h>
void main()
{
int num;
cout << &quot;Enter # of credits: &quot;;
cin >> num;

while(cin.fail()!=0)
{
cout << &quot;error&quot;;
cout << &quot;Enter # of credits: &quot;;
cin >> num;
}
}
Basically, I want to prompt the user to enter the number of credits, then test to see if the user entered an int. But if the user were to enter a letter, the program should report an error and re-prompt for # of credits. What happens is that when a user enters a non int value such as a letter, is the program goes into the while loops and &quot;error&quot; and &quot;Enter # of credits&quot; keeps getting displayed over and over, never stopping. And it doesnt let me re-enter the # of credits. Is the input buffer flooded? can I clear it out before I ask to re-enter the credits? I need this field to be and int so i can preform calculations with it later. Does anyone have any suggestions? [sig][/sig]

 

[simmeone]

Hi,

U can read the user-inputs as following:

u declare the int as char, for example:

#include <iostream.h>

int main ( void )
{
char num[20];


cout << &quot;Enter # of credits: &quot;;
cin.getline ( num, sizeof ( num ));

etc.

return 0;
}

After that when u need the string as int u have to change it with the function &quot;atoi&quot;. For details look MSDN.

I hope this will help u ...

SiM [sig][/sig]

 

[hca]

SiM

That is exactly what i was looking for. Thanks! [sig][/sig]