[C_MM39-易] 判斷是何種三角形(C++)

[C_MM39-易] 判斷是何種三角形

問題描述：當三個邊長能夠構成三角形時，再判斷該三角形為鈍角、銳角或是直角三角形，其判別方法如下：
1. 直角三角形：其中有兩個邊的平方和等於第三邊的平方。
2. 鈍角三角形：其中有兩個邊的平方和小於第三邊的平方。
3. 銳角三角形：任兩邊的平方和大於第三邊的平方。
輸入說明：輸入三個整數。
輸出說明：顯示直角三角形(Right Triangle)、鈍角三角形(Obtuse Triangle)、銳角三角形(Acute Triangle)或無法構成三角形(Not Triangle)。範例：

Sample Input:	Sample Output:
5 12 13 7 11 15	Right Triangle Obtuse Triangle

1. #include <iostream>  
2. using namespace std;  
3. //[C_MM38-易] 判斷3整數是否能構成三角形之三邊長  
4.    
5. int main() {  
6.     int a, b, c;  
7.     while(cin >> a >> b >> c)  
8.     {  
9.         if(a > b)  
10.         {  
11.             if(b > c) //a > b > c  
12.             {  
13.                 if(b+c > a)  
14.                 {  
15.                     if(b*b+c*c==a*a)  
16.                     {  
17.                         cout << "Right Triangle" << endl;  
18.                     }  
19.                     else if(b*b+c*c<a*a)  
20.                     {  
21.                         cout << "Obtuse Triangle" << endl;  
22.                     }  
23.                     else if(b*b+c*c>a*a)  
24.                     {  
25.                         cout << "Acute Triangle" << endl;  
26.                     }  
27.                 }  
28.                 else  
29.                 {  
30.                     cout << "Not Triangle" << endl;  
31.                 }  
32.             }  
33.             else  
34.             {  
35.                 if(a > c) //a > c > b  
36.                 {  
37.                     if(b+c > a)  
38.                     {  
39.                         if(b*b+c*c==a*a)  
40.                         {  
41.                             cout << "Right Triangle" << endl;  
42.                         }  
43.                         else if(b*b+c*c<a*a)  
44.                         {  
45.                             cout << "Obtuse Triangle" << endl;  
46.                         }  
47.                         else if(b*b+c*c>a*a)  
48.                         {  
49.                             cout << "Acute Triangle" << endl;  
50.                         }  
51.                     }  
52.                     else  
53.                     {  
54.                         cout << "Not Triangle" << endl;  
55.                     }  
56.                 }  
57.                 else //c > a > b  
58.                 {  
59.                     if(a+b > c)  
60.                     {  
61.                         if(b*b+a*a==c*c)  
62.                         {  
63.                             cout << "Right Triangle" << endl;  
64.                         }  
65.                         else if(b*b+a*a<c*c)  
66.                         {  
67.                             cout << "Obtuse Triangle" << endl;  
68.                         }  
69.                         else if(b*b+a*a>c*c)  
70.                         {  
71.                             cout << "Acute Triangle" << endl;  
72.                         }  
73.                     }  
74.                     else  
75.                     {  
76.                         cout << "Not Triangle" << endl;  
77.                     }  
78.                 }  
79.             }  
80.         }  
81.         else //b > a  
82.         {  
83.             if(a > c) //b > a > c  
84.             {  
85.                 if(a+c > b)  
86.                 {  
87.                     if(a*a+c*c==b*b)  
88.                     {  
89.                         cout << "Right Triangle" << endl;  
90.                     }  
91.                     else if(a*a+c*c<b*b)  
92.                     {  
93.                         cout << "Obtuse Triangle" << endl;  
94.                     }  
95.                     else if(a*a+c*c>b*b)  
96.                     {  
97.                         cout << "Acute Triangle" << endl;  
98.                     }  
99.                 }  
100.                 else  
101.                 {  
102.                     cout << "Not Triangle" << endl;  
103.                 }  
104.             }  
105.             else //b, c > a  
106.             {  
107.                 if(b > c) //b > c > a  
108.                 {  
109.                     if(a+c > b)  
110.                     {  
111.                         if(a*a+c*c==b*b)  
112.                         {  
113.                             cout << "Right Triangle" << endl;  
114.                         }  
115.                         else if(a*a+c*c<b*b)  
116.                         {  
117.                             cout << "Obtuse Triangle" << endl;  
118.                         }  
119.                         else if(a*a+c*c>b*b)  
120.                         {  
121.                             cout << "Acute Triangle" << endl;  
122.                         }  
123.                     }  
124.                     else  
125.                     {  
126.                         cout << "Not Triangle" << endl;  
127.                     }     
128.                 }  
129.                 else //c > b > a  
130.                 {  
131.                     if(a+b > c)  
132.                     {  
133.                         if(b*b+a*a==c*c)  
134.                         {  
135.                             cout << "Right Triangle" << endl;  
136.                         }  
137.                         else if(b*b+a*a<c*c)  
138.                         {  
139.                             cout << "Obtuse Triangle" << endl;  
140.                         }  
141.                         else if(b*b+a*a>c*c)  
142.                         {  
143.                             cout << "Acute Triangle" << endl;  
144.                         }  
145.                     }  
146.                     else  
147.                     {  
148.                         cout << "Not Triangle" << endl;  
149.                     }  
150.                 }  
151.             }  
152.         }  
153.     }  
154.     return 0;  
155. }