c语言 利用栈实现表达式求解

#include <iostream.h> #include <stdlib.h> #define stack_init_size 100 #define stackincreament 10 #define overflow -2 typedef struct{ char *base; char *top; int stacksize; }Sqstackcha; typedef struct{ double *base; double *top; int stacksize; }Sqstackdou; Sqstackcha optr; Sqstackdou opnd; char gettop (Sqstackcha &s); double gettop(Sqstackdou &s); int precede(Sqstackcha &s,char c); void initstack(Sqstackcha &s); void initstack(Sqstackdou &s); double opterate(double a,char theta,double b); void push(Sqstackcha &s,char e); void push(Sqstackdou &s,double e); char pop(Sqstackcha &s,char e); double pop(Sqstackdou &s,double e); void initstack(Sqstackcha &s)