express.h

这是c++编程方面的名著的例子代码

#include <iostream.h>
#include <Operators.h>
#include <operand.h>






class expression_component : public operator_type, public operand{
protected:
	int IsOperator;
	int IsOperand;
	int IsFunction;
public:
    expression_component(void);
    expression_component(const expression_component &X);
    expression_component &operator=(const expression_component &X);
    int operator>(const expression_component &X) const;
    int operator<(const expression_component &X) const;
    int operator==(const expression_component &X) const;
    int operator>=(expression_component &X);
    int operator<=(expression_component &X);
    int operator!=(expression_component &X);
    int operator()(expression_component &X,expression_component &Y);
    friend ostream &operator<<(ostream &Out,expression_component &X);
    int isOperator(void);
    void isOperator(int Bool);
    int isOperand(void);
    void isOperand(int X);
    void isFunction(int X);
    int isFunction(void);

    operand operand_type(void);
    operator_type opType(void);
};