I need help please!

This has got to be really simple but I can't figure it out... I got
swamped with work and am doing this project for a class that I'm
taking and I can't figure out why the output is like this.

I'm taking a Functional Programming in C and I have to write a
shuffling program. The problem is that when I ask the user if they
want to shuffle, they type y or n to answer. It then goes into a
switch statement and executes code. It exits if they type no and is
suppose to keep looping until they say no.

So... Here is the output I'm getting:

-------------
The array holds 20 elements which consists of:
{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20 }

Would you like to shuffle the array? (y=yes, n=no): y
You have said you would like to shuffle.
Shuffling...

Would you like to shuffle the array? (y=yes, n=no): Would you like to
shuffle the array? (y=yes, n=no):
----------------

Notice that the question is getting asked twice instead of just once
(after it loops). I added a default: line to my switch statement and
it seems to be reading something else in the userval variable but I
can't figure out what I'm doing wrong. Please help... This is due in
4 hours. -- Before anyone flames me, I didn't purposely
procrastinate on this, I work full time, have a family and didn't get
a chance to do this earlier.

Here is my code:
-----------------
#include <math.h>
21 #include <stdio.h>
22 #include <stdbool.h>
23 #include <stdlib.h>
24 #include <math.h>
25 #define SIZE 20
26
27 // function prototypes
28
29
30 // main program
31 int main(void) {
32
33 // declare variables
34 int
35 array1[SIZE]= { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20 },
36 cnt = 0;
37
38 bool cont = true;
39 char userval;
40
41 // while(cont) {
42 // Display the contents of the array.
43 printf("The array holds %d elements which consists of:
\n { ", SIZE);
44
45 for(cnt = 0; cnt < SIZE; cnt++) {
46 (cnt != SIZE - 1) ? printf("%d, ", array1[cnt]) :
printf("%d ", array1[cnt]);
47 }
48
49 printf("}\n\n");
50
51 while(cont) {
52 // ask if the user woule like to shuffle the contents
of the array
53 printf("Would you like to shuffle the array? (y=yes,
n=no): ");
54 scanf("%c", &userval);
55
56 switch(userval) {
57 case 'y':
58 case 'Y':
59 printf("You have said you would like to
shuffle.\nShuffling...\n\n");
60 break;
61
62 case 'n':
63 case 'N':
64 printf("No shuffling will take place.
\nExiting...\n");
65 cont = false;
66 break;
67 }
68 }
69 }
-----------------
.

Relevant Pages

  • Re: "how to split a string in a random way"
    ... I created an integer array and I pass it along with a ... number to Factorize(). ... This time I send array1 through the Shuffle() method just prior to sending ... Dim array3 As Integer= Utility.GenArray ...
    (microsoft.public.dotnet.languages.vb)
  • Re: random generator for a given period
    ... array such that the same index is never visited once (and consequently ... shuffle the first m integers) Call it List_m. ... static int[] array; ...
    (sci.math)
  • Re: round-robin an arraylist
    ... Of all of them the work on the Array is the fastest. ... RemoveAt(), Addparadigm to do the shuffle is only slightly slower than the ... public class RoundRobin { ...
    (microsoft.public.dotnet.languages.csharp)
  • Re: Card dealing and random repetition
    ... inspiring for an 'elegant' way to simulate a shuffle. ... The dealer divide the deck in two parts, array ... left-half-deck (here there is a slight probability of 2 card staying ...
    (comp.programming)
  • Re: randomly choose some uniq elements of an array
    ... >> Why do you think it makes sense to shuffle the whole array in order to ... > whole array (i.e. do a length-changing splice) in order to pick three ... "Reply" at the bottom of the article headers. ...
    (comp.lang.perl.misc)