[已解决]这个程序到底哪里出错了啊？？？

huhuhu12138

#include<iostream>
#include<math.h>
using namespace std;
class point;
class distance
{
private:
    double length;
public:
    distance(double h);
    void qiuhe(point a,point b);
};
class point
{
private:
    double x;
    double y;
public:
    friend class distance;
    point(double a,double b);
};
int main()
{
    point x1(0,0),x2(0,0);
    distance s(1.0);
    s.qiuhe(x1,x2);
    return 0;
}
point::point(double a,double b)
{
    cin>>a>>b;
    x=a;y=b;
}
distance::distance(double h)
{
    length=h;
    cin>>h;
    length=h;
}
void distance::qiuhe(point a,point b)
{
    distance temp(0.0);
    temp=sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
    cout<<temp.length;
}

最佳答案

月排行榜 / 总排行榜

人造人

2018-1-26 17:55:45

using namespace std;
偷懒可不是什么好事

碰巧std命名空间也有一个叫distance这玩意的

1. #include<iostream>
   
2. #include<math.h>
   
3. 
   
4. //using namespace std;
   
5. class point;
   
6. 
   
7. class distance
   
8. {
   
9. private:
   
10.         double length;
    
11. public:
    
12.         distance(double h);
    
13.         void qiuhe(point a, point b);
    
14. };
    
15. 
    
16. class point
    
17. {
    
18. private:
    
19.         double x;
    
20.         double y;
    
21. public:
    
22.         friend class distance;
    
23.         point(double a, double b);
    
24. };
    
25. 
    
26. int main()
    
27. {
    
28.         point x1(0, 0), x2(0, 0);
    
29.         distance s(1.0);
    
30.         s.qiuhe(x1, x2);
    
31.         return 0;
    
32. }
    
33. point::point(double a, double b)
    
34. {
    
35.         std::cin >> a >> b;
    
36.         x = a; y = b;
    
37. }
    
38. distance::distance(double h)
    
39. {
    
40.         length = h;
    
41.         std::cin >> h;
    
42.         length = h;
    
43. }
    
44. void distance::qiuhe(point a, point b)
    
45. {
    
46.         distance temp(0.0);
    
47.         temp = sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y));
    
48.         std::cout << temp.length;
    
49. }
    

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跳转到最佳答案楼层

BngThea

感觉好乱，你要习惯类用大写字母开头，同类的函数实现放到一起
还有类方法qiuhe中定义类对象是什么鬼

人造人

using namespace std;
偷懒可不是什么好事

碰巧std命名空间也有一个叫distance这玩意的

1. #include<iostream>
   
2. #include<math.h>
   
3. 
   
4. //using namespace std;
   
5. class point;
   
6. 
   
7. class distance
   
8. {
   
9. private:
   
10.         double length;
    
11. public:
    
12.         distance(double h);
    
13.         void qiuhe(point a, point b);
    
14. };
    
15. 
    
16. class point
    
17. {
    
18. private:
    
19.         double x;
    
20.         double y;
    
21. public:
    
22.         friend class distance;
    
23.         point(double a, double b);
    
24. };
    
25. 
    
26. int main()
    
27. {
    
28.         point x1(0, 0), x2(0, 0);
    
29.         distance s(1.0);
    
30.         s.qiuhe(x1, x2);
    
31.         return 0;
    
32. }
    
33. point::point(double a, double b)
    
34. {
    
35.         std::cin >> a >> b;
    
36.         x = a; y = b;
    
37. }
    
38. distance::distance(double h)
    
39. {
    
40.         length = h;
    
41.         std::cin >> h;
    
42.         length = h;
    
43. }
    
44. void distance::qiuhe(point a, point b)
    
45. {
    
46.         distance temp(0.0);
    
47.         temp = sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y));
    
48.         std::cout << temp.length;
    
49. }
    

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huhuhu12138

人造人 发表于 2018-1-26 17:55
using namespace std;
偷懒可不是什么好事

谢谢，谢谢！！！