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//--------------------------------expressions.h------------------------------
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
class Arithparser {
public:
enum { WORD_MAX = 100 };
double parse (char *string, double lookup (char *));
private:
struct {
char type; /* ( = left parenthesis, ) = right parenthesis,
z = end of token stream,
o = operator, n = numerical value,
i = identifier
*/
double value; /* if type==o, then 1=+, 2=-, 3=*, 4=/ */
} tokens[WORD_MAX];
int tokenpointer;
void tokenize (char *string, double lookup(char *));
double perform (double operand1, double opcode, double operand2);
double parseval (int *tptr);
double nextoperand (int *tptr);
};
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