第三周实验报告4求长方体的体积表面积

#include <iostream>  

using namespace std; 
 
class Cft

{ 
public:  
    void set_date();  

    void tj();  

    void show_volume(); 
	
    void bmj(); 
	
    void show_areas();  

private:   
      
    double length;

	double width;

	double heigth;

	double volume;

	double areas; 
};
  
int main( )  
{  
    Cft  n1, n2, n3; 

    n1.set_date();  

    n1.tj();  

    n1.show_volume();
	
    n1.bmj();
	
    n1.show_areas();

	n2.set_date();
	
    n2.tj();
	
    n2.show_volume ();  
	
    n2.bmj();
	
    n2.show_areas();


	n3.set_date(); 
	
    n3.tj(); 
	
    n3.show_volume();
	
    n3.bmj(); 
	
    n3.show_areas();
	
    

    return 0;  
}  
  
void Cft::set_date( )   
{  
      
   cout << "请输入长方形的长宽高：" << endl;  

    cin >> length >> width >> heigth;
	
    
      
}  
void Cft::tj( )  
{  
    volume = length* width * heigth;  
    
    
      
}  
void Cft::show_volume( )        
{  
    cout<<"长方柱的体积为："<<volume<<endl;  
   
    
}  
  
void Cft::bmj( )  
{  
    areas = 2*(length * width + length * heigth + width * heigth);  
    
      
}  
  
void Cft::show_areas( )        
{  
    cout<<"长方柱的表面积为："<<areas<<endl;  
   
   
}  

程序中变量名一定不能和函数名相同啊