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| #include <iostream>
#include <cmath>
#include <cstdlib>
#define PI 3.14159265
using namespace std;
class Triangle
{
private:
struct point{
double x, y;
}a, b, c;
double length(point &a, point &b)
{
return sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y));
}
protected:
double lenab, lenac, lenbc;
double ugol(double lenb, double lenc, double lena)
{
return acos((lenb*lenb + lenc*lenc - lena*lena) / (2.0*lenb*lenc))*180/PI;
}
double perimetr()
{
return lenab + lenac + lenbc;
}
double square()
{
double p = perimetr() / 2.0;
return sqrt(p*(p - lenab)*(p - lenac)*(p - lenbc));
}
double ravnTr(Triangle &x)
{
return (lenab == x.lenab) && (lenac == x.lenac) && (lenbc == x.lenbc);
}
public:
int proverka()
{
return (lenab + lenac >= lenbc) && (lenab + lenbc >= lenac) && (lenac + lenbc >= lenab);
}
static void ravntriangle(Triangle *arr,int n)
{
for (int i = 0,j=0; i < n-1;++i)
for (j = i+1; j < n - 1;++j)
if (arr[i].ravnTr(arr[j]))
cout << "Triangle " << i << " = Triangle " << j << endl;
}
void setpoint(point &x)
{
cout << "Input x" << endl;
cin >> x.x;
cout << "Input y" << endl;
cin >> x.y;
}
Triangle()
{
cout << "Point a" << endl;
setpoint(a);
cout << "Point b" << endl;
setpoint(b);
cout << "Point c" << endl;
setpoint(c);
lenab = length(a, b);
lenac = length(a, c);
lenbc = length(b, c);
}
virtual void show()
{
if (proverka())
{
cout << "Point a" << endl;
cout << "x= " << a.x << " y= " << a.y << endl;
cout << "Point b" << endl;
cout << "x= " << b.x << " y= " << b.y << endl;
cout << "Point c" << endl;
cout << "x= " << c.x << " y= " << c.y << endl;
cout << "ab= " << lenab << " ac= " << lenac << " bc= " << lenbc << endl;
cout << "ugol c = " << ugol(lenac, lenbc, lenab) << " ugol b = " << ugol(lenbc, lenab, lenac) << " ugol a = " << ugol(lenac, lenab, lenbc) << endl;
cout << "perimetr= " << perimetr() << endl;
cout << "square= " << square() << endl;
}
else
cout << " Triangle is not " << endl;
}
};
class RavnTriangle:public Triangle
{
public:
int proverkaravn()
{
return lenab + lenac + lenbc;
}
double mediana()
{
return lenab*sqrt(3.0) / 2.0;
}
static double lowmediana(RavnTriangle *arr, int n)
{
int min=0;
for (int i = 1; i < n - 1;++i)
if (arr[i].mediana() < arr[min].mediana())
min = i;
return arr[min].mediana();
}
void show()
{
if (proverkaravn())
{
cout << "ab= " << lenab << " ac= " << lenac << " bc= " << lenbc << endl;
cout << "ugol c = " << ugol(lenac, lenbc, lenab) << " ugol b = " << ugol(lenbc, lenab, lenac) << " ugol a = " << ugol(lenac, lenab, lenbc) << endl;
cout << "mediana = " << mediana() << endl;
cout << "perimetr= " << perimetr() << endl;
cout << "square= " << square() << endl;
}
else
cout << " Triangle is not " << endl;
}
RavnTriangle()
{
cout << "input ab" << endl;
cin >> lenab;
cout << "Point ac" << endl;
cin >> lenac;
cout << "Point bc" << endl;
cin >> lenbc;
}
};
int main()
{
int i = 0,n,m;
cout << "input n" << endl;
cin >> n;
cout << "input m" << endl;
cin >> m;
Triangle* a = new Triangle [n];
for (; i < n;++i)
{
cout << "triangle " << i << endl;
a[i].show();
}
Triangle::ravntriangle(a, n);
RavnTriangle* b = new RavnTriangle[m];
for (i=0; i < m; ++i)
{
cout << "ravntriangle " << i << endl;
b[i].show();
}
cout << "low mediana= " << RavnTriangle::lowmediana(b, m) << endl;;
system("pause");
return 0;
} |
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