david kill me

#define STACK_SIZE 100
#include <stdio.h>

char stack[STACK_SIZE];
int sp;


/*
 * Pushes character c onto the stack.
 * Returns 0 if successful.
 * Returns -1 if an error occurs.  (Stack full).
 */
int push (char c)
{
  if ((sp+1)< STACK_SIZE){
    stack[++sp] = c;
    return 0;
  }
  else{
    return -1;
  }
}


/*
 * Pops next character off the stack.
 * Returns the char if successful.
 * Returns -1 if an error occurs.  (Stack empty).
 */
int pop ()
{
  if (sp==0)
    {
      return -1;
    }
  else{
    sp--;
    return stack[sp+1];
  }
}

/*
 * Returns the current size of the stack.
 */
int stackSize()
{
  return sp;
    // TODO
}

/*
 * Tests if the stack is correctly implemented
 */
int main () {
    int c;
    int value;
    int line;
    int charnum;
    int result;
    line = 1;
    charnum = 0;
    c = getchar();
    while (c != EOF) {
        c = getchar();
        charnum++;
        if (stackSize() == STACK_SIZE) {
            result = 1;
            printf("Error: Stack Full!");
            break;
        }
        if (c == '(' || c == '[' || c == '{') {
            push(c);
        } else if (c == '\n') {
            line++;
            charnum = 0;
        } else if (c == ')' || c == '}' || c == ']') {
            value = pop();
            if (value == '(') {
                value = ')';
                if (c == value) {
                    result = 0;
                }
            }
	    else if (value == '[') {
	      value = ']';
	      if (c == value) {
		result = 0;
	      }
	    }
	    else if (value == '[') {
	      value = ']';
	      if (c == value) {
		result = 0;
	      }
	    }
	    else {
                result = 1;
                printf("Line %d, Char %d: Found %c, expected )", line, charnum, c);
                break;
            }
        } else if (value == '\0') {
            printf("Line %d, Char %d: Found %c. No matching character", line, charnum, c);
            break;
        }
    }
    while (c == EOF) {
        if (pop() == '(') {
            printf("Error: Expecting ), found end of input.");
        } else if (pop() == '[') {
            printf("Error: Expecting ], found end of input.");
        } else if (pop() == '{') {
            printf("Error: Expecting }, found end of input.");
        }
    }
    if (result == 0) {
        printf("Well formatted input.");
    }
}