Compiling errors

The following program won't compile correctly. I have the error message being given to me as I try and compile it. Does anyone have a solution? Also, is the last half correct in order to get the box to be drawn with the character selected by the user?

Program:

Code:

#include <stdio.h>

int computeSurfaceArea (int, int, int);
int computeVolume (int, int, int);
void displayTopBottom (int, int);
void displayyFrontBack (int, int);
void displaySide (int, int);

int main ()

{
   char choices;
   int width;
   int height;
   int depth;
   char symbol,ch1, ch;
   int OK;

   do {
      printf("Enter the width -- must be a positive integer: ");
      scanf("%d", &width);
   }
   while (width < 0);
  do


   do
   {
      printf("Enter the height -- must be a positive integer: ");
      scanf("%d", &height);
   }
   while (height < 0);


   do
   {
      printf("Enter the depth -- must be a positive integer: ");
      scanf("%d", &depth);
   }
   while (depth < 0);



      printf("Enter a character to be used to draw: ");
      scanf("%s", &symbol);


  do
  {
   printf("Menu\n");
   printf("A -- Calculate the Surface Area of the Box\n");
   printf("V -- Calculate the Volume of the Box\n");
   printf("F -- Display the Front/Back of the Box\n");
   printf("T -- Display the Top/Bottom of the Box\n");
   printf("S -- Display the Side of the Box\n");
   printf("Q -- Quit\n");

   printf("Please make a selection\n");
   scanf("%d",&ch);
   ch1 = getchar();

   OK = 0;

   switch (ch)
   {
      case 'A':
  Volume (height, width, depth);
  OK = 1;
  break;

      case 'F':
        FrontBack (width, height);
  OK = 1;
  break;

      case 'T':
        TopBottom (width, depth);
  OK = 1;
  break;

      case 'S':
       Side (depth, height);
  OK =1;
  break;

      case 'Q':
  OK = 1;
  break;

 default:
  printf("Please make another selection\n");
  OK = 0;
}
  }
  while (OK = 0);


  return 0;
}

  int computeSurfaceArea  (int width, int depth, int height)
 {
     int area = (2 * width * depth) + (2 * height * width) + (2 * depth * height);
     return area;
  }

  int computeVolume  (int width, int depth, int height)
  {
     int volume = (depth * width * height);
     return volume;
  }

  void displayFrontBack(int a        , int b         )
{
   int i,j;
   for(j=0; j < b-1;j++)
   {for(i=0;i< a-1;i++)
      printf("%c",'*');
         printf("\n");
   }
}

  void  displayTopBottom(int b        , int c        )
{
   int i,j;
   for(j=0; j<b-1; j++)
   {for(i=0; i< c-1; i++)
      printf("%c", '*');
   printf("\n");
   }
}

  void  displaySide(int a       , int c       )
{
   int i,j;
   for(j=0; j<c-1; j++)
   {for(i=0; i<a-1; i++)
      printf("%c", '*');
   printf("\n");
 }
}

Error message:

/tmp/ccM2czSC.o: In function `main':
/tmp/ccM2czSC.o(.text+0x157): undefined reference to `SurfaceArea'
/tmp/ccM2czSC.o(.text+0x17c): undefined reference to `Volume'
/tmp/ccM2czSC.o(.text+0x197): undefined reference to `FrontBack'
/tmp/ccM2czSC.o(.text+0x1b2): undefined reference to `TopBottom'
/tmp/ccM2czSC.o(.text+0x1cd): undefined reference to `Side'
collect2: ld returned 1 exit status

Thanks!

More or less just what the errors say. You define a function, for example, called

Code:

int computeVolume (int, int, int);

But you try to call a function like this.

Code:

Volume (height, width, depth);

Notice that computeVolume is not that same as Volume.

Also, you've got a misplaced do.

Write 5 lines and compile is a debug strategy.
Write 100 lines and dump on a message board for someone else to fix isn't.

Basically, you write as much as you feel you can cope with if it all goes wrong, and then you have a lot less to look at, and a lot less to fix.