39 lines
821 B
C++
39 lines
821 B
C++
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#include <cmath>
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#include <iostream>
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using namespace std;
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class Triangle {
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public:
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double a, b, c;
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Triangle(double an, double bn, double cn) : a(an), b(bn), c(cn) {
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if (!Triangle::exst_tr()) {
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this->a = 3;
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this->b = 4;
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this->c = 5;
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}
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}
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bool exst_tr();
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void show();
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double perimetr();
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double square();
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};
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bool Triangle::exst_tr() {
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return Triangle::perimetr() - max(max(this->a, this->b), this->c) * 2 > 0;
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}
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void Triangle::show() {
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cout << "A = " << this->a << ", B = " << this->b << ", C = " << this->c << endl;
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}
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double Triangle::perimetr() {
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return this->a + this->b + this->c;
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}
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double Triangle::square() {
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double p = Triangle::perimetr() / 2;
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return sqrt(p * (p - this->a) * (p - this->b) * (p - this->c));
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}
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