/* function type */
typedef enum {
- Val = 0,
+ Val = 0, Set,
Add, Sub,
Mul, Div, Pow,
Sqr,
/* calculus element type */
-#define MAX_OPERANDS 2
+#define MAX_OPERANDS 10
typedef struct _element_t {
func_t func;
int nbops;
float value;
} element_t;
+#define ERROR_OP ((element_t *)(-1))
+
/* parser function */
-element_t *parser (char *str);
+element_t *parser (char *str, char **next);
void print_element (element_t *root, int level);