Beginner C Question Help

Originally Posted by Nimbuz

Sorry for digging up an old thread, but I had the same problem as the OP. This book indeed sucks, I wasted a day on the isDigit, rand and time functions! Switching to "C for Dummies".

Well I'm certainly digging up an old thread too lol. I have just started this book myself and am frustratingly working on the same problem. I found this thread after extensive searching for information and ideas. I have gone over and over this problem so much that I wonder if it's possible using only the lessons learned from the first three chapters. The book's website has a download available for fixing errors found inthe book but I have still come across other small errors just in the first three chapters. I would be very keen to hear what you thought of "C for Dummies" Nimbuz - assuming that after two years you will be reading this.

I have mine sort of working but I don't feel that it is truly correct - if the user has entered a character the program says to "please enter a digit" but still continues on with the rest of the program.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>

main() //Guess a number from 1 to 10
{
  int iRandomNum = 0;
  //int iResponse = 0;
  char cResponse = '\0';
  srand(time(NULL));

  iRandomNum = (rand() % 10) + 1;

  printf("\nGuess a number from 1 to 10: ");
  //scanf("%d", &iResponse);
  scanf("%c", &cResponse);


  if (isdigit(cResponse) == 0) {
    // check to see if user has entered a digit
    printf("\nYou need to enter a digit please.  \n");
  }
   if (cResponse == iRandomNum) {
      // if user input = random number
      printf("\nYou are correct!\n");

}     else
        printf("\nBummer dude\n");
        printf("\nThe correct number was %d\n", iRandomNum);

}

Would appreciate any advice if anyone is reading this after so long

@Susan M:

Has the book covered loops?
If yes, I think a do/while loop would be needed.
If not, I would skip this problem till the book covers loops.

Tim S.

Originally Posted by stahta01

@Susan M:

Has the book covered loops?
If yes, I think a do/while loop would be needed.
If not, I would skip this problem till the book covers loops.

Tim S.

Actually Tim when I first came across the problem I thought that a do/while loop would be suitable here. However Chapter 4, which I'm about to start, covers do/while loops. Therefore I thought that being a Chapter 3 problem it should only cover the topics learnt. However, I'm starting to wonder if this book is logical :-)