how to reversed a line of text using stack??

Code:

---

#include <stdio.h>
#include <stdlib.h>
#include <stack>
#define MAXSTACK  50

struct StackRec
{
  int top;
  char entry[MAXSTACK];
};

typedef struct StackRec Stack;


void initializeStack(Stack *stackPtr)
{
  stackPtr->top = -1;
}


int stackEmpty(const Stack *stackPtr)
{
  if (stackPtr->top < 0)
  {
      return 1;        //return true
  }
  else
  {
      return 0;        //return false
  }
}


int stackFull(const Stack *stackPtr)
{
  if (stackPtr->top >= MAXSTACK - 1)
  {
      return 1;        //return true
  }
  else
  {
      return 0;        //return false
  }
}



void push(Stack *stackPtr, char item)
{
  if (stackFull(stackPtr))
  {
      printf("Stack is full\n");
  }
  else
  {
      stackPtr->top++;
      stackPtr->entry[stackPtr->top] = item;
  }
}



float pop(Stack *stackPtr)
{
  float item;

  if (stackEmpty(stackPtr))
  {
      printf("Stack is empty\n");
  }
  else
  {
      item = stackPtr->entry[stackPtr->top];
      stackPtr->top--;
  }

  return item;
}


void main()
{
  Stack theStack;
  float next;
  char str [50];
  int i;
 

  initializeStack(&theStack);
  printf("Please enter a string: ");
  while (scanf("%c", str) != EOF) {
      push(&theStack, next);
  }
  while (!stackEmpty(&theStack)) {
      next = pop(&theStack);
          for (i=0;i<MAXSTACK;i++){
        printf("i=%d",i);
      printf("%c \n", str[i]);
  }
  printf("Reversed line: ");
  printf("Is palindrome?");
}
}

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Help me see what's wrong i make??

http://cboard.cprogramming.com/showthread.php?t=72021

printf("Please enter a string: ");
while (scanf("%c", str) != EOF)
push(&theStack, next);

I don't use C I/O very much, but the above just looks wrong. It appears to me that scanf() is expecting the address of a char and you are giving it the address of a string. So I would either:
a) obtain user input using scanf("%s", str) to read in the entire string outside the while loop and then use a loop to read each char from the string to the stack one at a time.
b) change it somehow so I didn't read each char (scanf("%c", ) to the same address (str) each time through the while loop.

Personally, I would favor option a.

Quote:

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#include <stack>

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?????