Triangle class (construction and deconstruction)

Catalog

Title Description

AC Code

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Title Description

Define a triangle class CTriangle, Attribute contains three sides and triangle type , Where the triangle type is saved in a string . Triangle types are as follows :

 

an isosceles triangle ：isosceles triangle
right triangle ：right triangle
Isosceles right triangle ：isosceles right triangle
Equilateral triangle ：equilateral triangle
General triangle ：general triangle
Can't make a triangle ：no triangle

The conditions for judging right triangle ： The square length of one of the three sides of a triangle is equal to the sum of the square lengths of the other two sides

Class behavior includes constructing 、 destructor 、 Calculate the area, etc . Where the constructor will set the length of three edges , And judge whether the three sides can form a triangle 、 And set the triangle type . The destructor clears the length of the three edges 0, And set the triangle type to none

The triangle area is calculated as follows

Input

Number of groups of test data

The first set of edges 1 The first set of edges 2  The first set of edges 3

The second set of edges 1 The second set of edges 2 The second set of edges 3

......

Output

The first triangle type , area

The second triangle type , area

......

If you don't form a triangle , There is no need to output area

Area precision to the decimal point 1 position

sample input 1 

3
3.0 2.0 6.0
3.0 4.0 5.0
1.0 1.0 1.414

sample output 1

no triangle
right triangle, 6.0
isosceles right triangle, 0.5

AC Code

#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<iomanip>
using namespace std;
class CTriangle{
	string kind;
	float a,b,c;
	public:
		CTriangle(float a,float b,float c):a(a),b(b),c(c){
			if(a+b>c&&a+c>b&&b+c>a)
			{
				if(a==b&&b==c)
				kind="equilateral triangle";
				else if(a==b||a==c||b==c)
				{
					if(fabs(c*c-(a*a+b*b))<0.01||fabs(a*a-(b*b+c*c))<0.01||fabs(c*c+a*a-b*b)<0.01)
					kind="isosceles right triangle";
					else
					kind="isosceles triangle";
				}
				else if(fabs(c*c-(a*a+b*b))<0.01||fabs(a*a-(b*b+c*c))<0.01||fabs(c*c+a*a-b*b)<0.01)
				kind="right triangle";
				else
				kind="general triangle";			
			}
			else
			kind="no triangle";
		} 
		~CTriangle(){
			a=b=c=0;
			kind="none";
		}
		float area(){
			float p=(a+b+c)/2;
			return sqrt(p*(p-a)*(p-b)*(p-c));
		}
		void display(){
			if(kind=="no triangle")
			cout<<kind<<endl;
			else 
			cout<<kind<<", "<<fixed<<setprecision(1)<<area()<<endl;
		}
}; 
int main() {
	int t;
	float a,b,c;
	cin>>t;
	while(t--){
		cin>>a>>b>>c;
		CTriangle angle(a,b,c);
		angle.display();
	}
}