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#include <ctype.h> 
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MEM 100
#define READ 10
#define WRITE 11
#define LOAD 20
#define STORE 21
#define ADD 30
#define SUBSTRACT 31
#define DIVIDE 32
#define MUL 33
#define BRANCH 40
#define BRANCHNEG 41
#define BRANCHZERO 42
#define HALT 43

int count_down = 99;

struct stackNode_2 {
  int data;
  struct stackNode_2 *nextPtr;
};

typedef struct stackNode_2 StackNode_2;
typedef StackNode_2 *StackNodePtr_2;

typedef struct tableEntry {
  char symbol[10];
  char type;
  int location;

} data;

int my_isdigit(char alpha);
int my_isalpha(char alpha);
int isOperator_2(char c);

char stackTop_1(StackNodePtr_2 topPtr);

int helper_search_1(data *base, char *token, int run);

int helper_search_2(data *base, char *token, int run);

int (*helper_search[2])(data *base, char *token, int run) = {helper_search_1,
                                                             helper_search_2};

int search_in_base(data *intro_search, char *str_tok_search);
int helper_search_base(data *base, char *token, int run);

void convertToPostfix_1(char infix[], char postfix[]);

int pop_2(StackNodePtr_2 *topPtr);
void push_2(StackNodePtr_2 *topPtr, int info);
int isEmpty_2(StackNodePtr_2 topPtr);

int precedence_1(char operator1, char operator2);

void convertToPostfix_1(char infix[], char postfix[]) {
  int i = 0, j = 0;
  char c;

  /* Push left parenthesis to stack */
  StackNodePtr_2 stackPtr = NULL;
  push_2(&stackPtr, '(');

  /* Add right parenthesis to end of infix */
  while (infix[i] != '\0')
    i++;

  infix[i++] = ')';
  infix[i] = '\0';

  i = 0;