Thread: Help! with character validity check

Thanks this has helped a lot. Maybe I can get it now. I'll give this theory a try and see what I get. I'm sure i'll be back with more questions.

I only have one more week of this 5 week class, and have realized I have just skimmed the surface of "C" and do not know it well enough too save my bacon.

Thanks everyone for help.
Tamara

Well I've tried every suggesting and still cannot get the character check to work. My last attempt had an endless loop of two re-enters across the screen. The program works great until I try to add this character check. Then nothing works right. Attached is my latest version without the character check.

I have learned a lot even though my program still does not work. I am very thankful for all of the help. Thanks everyone.

Tamara

After trial and error and all the responses I finally got the program to run it just needed this

Code:

iResponse = scanf("%f", &fSubtotal );

while (fSubtotal < fCheck || iResponse != 1){
	fflush(stdin);
	printf("\n\tPlease Re-enter your Subtotal: $");
	iResponse = scanf("%f", &fSubtotal );
	}//end while loop

The reason it kept loopping is I needed to flush the variable. How wierd but it works.
Thanks again

Attached is the final program. That works great.

Well its good to hear you got it running. fflush(stdin) is not meant to be a good way to flush the input buffer tho. Heres an explanation of why. And Heres an example of a better method.

Thanks Mike

Since yesterday I have learned more about "C" in one 24-hour period than the whole 4 weeks of class

Tamara