第三週項目一——三角形類2
int main()
{
Triangle tri1; // ( )
double x,y,z;
cout<<" :";
cin>>x>>y>>z;
tri1.setA(x);
tri1.setB(y);
tri1.setC(z); //
if(tri1.isTriangle())
{
cout<<" :"<<tri1.getA()<<','<<tri1.getB()<<','<<tri1.getC()<<endl;
cout<<" :"<< tri1.perimeter()<<'\t'<<" :"<< tri1.area()<<endl;
}
else
cout<<" "<<endl;
return 0;
}
私の答え:
/* Copyright (c) 2014,
* All rights reserved.
* :test.cpp
* :
* :2015 3 25
* :v1.0
* : 1,main() , Triangle , set get , , 。
* : double 。
* : double
*/
#include <iostream>
#include <cmath>
using namespace std;
class Triangle
{
public:
void setA(double x)
{
a=x;
}
void setB(double y)
{
b=y;
}
void setC(double z)
{
c=z;
}
double getA(void)
{
return a;
}
double getB(void)
{
return b;
}
double getC(void)
{
return c;
}
bool isTriangle(); //
double perimeter(void); //
double area(void); //
private:
double a,b,c; //
};
int main()
{
Triangle t; // ( )
double x,y,z;
cout<<" :";
cin>>x>>y>>z;
t.setA(x);
t.setB(y);
t.setC(z); //
if(t.isTriangle())
{
cout<<" :"<<t.getA()<<','<<t.getB()<<','<<t.getC()<<endl;
cout<<" :"<<t.perimeter()<<'\t'<<" :"<<t.area()<<endl;
}
else
cout<<" 。"<<endl;
return 0;
}
bool Triangle::isTriangle()
{
if(a+b>c&&b+c>a&&a+c>b)
return 1;
else
return 0;
}
double Triangle::perimeter(void)
{
int sum;
sum=a+b+c;
return sum;
}
double Triangle::area(void)
{
double p,s;
p=(a+b+c)/2;
s=sqrt(p*(p-a)*(p-b)*(p-c));
return s;
}
勉强の心得:今回は顺调に书いて、顽张りましょう!!