struct s_vartbl { // structure of the variable table
char name[MAXVARLEN]; // variable's name
char type; // its type (T_NUM, T_INT or T_STR)
char level; // its subroutine or function level (used to track local variables)
unsigned char size; // the number of chars to allocate for each element in a string array
short int dims[MAXDIM]; // the dimensions. it is an array if the first dimension is NOT zero
union u_val {
MMFLOAT f; // the value if it is a float
long long int i; // the value if it is an integer
MMFLOAT *fa; // pointer to the allocated memory if it is an array of floats
long long int *ia; // pointer to the allocated memory if it is an array of integers
char *s; // pointer to the allocated memory if it is a string
} val;
};