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C++ - Kiểm tra tam giác có hợp lệ không dựa vào 3 góc được nhập từ bàn phím
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C++ - Kiểm tra tam giác có hợp lệ không dựa vào 3 góc được nhập từ bàn phím
Viết một chương trình kiểm tra tam giác có hợp lệ không dựa vào 3 góc được nhập từ bàn phím
Bài giải
-------------------- ######## --------------------
Tam giác được coi là hợp lệ khi tổng 3 góc của chúng bằng 180o và không có góc nào bằng 0.

Bài viết này được đăng tại freetuts.net, không được copy dưới mọi hình thức.
Cách giải chương trình trên như sau:
- Nhập 3 góc của tam giác từ bàn phím lần lượt là g1, g2, g3
- Tính tổng của 3 góc: sum = g1+ g2 + g3
- Kiểm tra điều kiện tam giác hợp lệ đã nêu ở trên thì sum = 180o và g1 != 0, g2 != 0 và g3 != 0
Chúng ta cùng giải chương trình trên bằng cấu trúc điều khiển if else trong C++ như sau:
#include <iostream>
using namespace std;
int main()
{
int g1, g2, g3, sum;
cout << "Goc 1: ";
cin >> g1;
cout << "Goc 2: ";
cin >> g2;
cout << "Goc 3: ";
cin >> g3;
sum = g1 + g2 + g3;
if(g1 != 0 && g2 != 0 && g3 != 0 && sum == 180) {
cout << "Tam giac co 3 goc lan luot la " << g1 << ", " << g2 << ", " << g3 << " la hop le";
} else {
cout << "Tam giac co 3 goc lan luot la " << g1 << ", " << g2 << ", " << g3 << " la khong hop le";
}
return 0;
}
Và kết quả sau khi thực thi chương trình trên như sau:
Bài viết này được đăng tại [free tuts .net]
Khi nhập g1 = 0, g2 = 369, và g3 = 2:

Khi nhập g1 = 60, g2 = 60, và g3 = 60:

Khi nhập g1 = 20, g2 = 120, và g3 = 40:

8. Bài tập if else C++
Cùng chuyên mục: