
Tính tổng cấp số cộng
- Posted by Thân Triệu
- Phân loại Bài tập lập trình C
- Date 22/08/2020
- Các bình luận 29 Các bình luận
Trong nội dung này ta sẽ viết chương trình giải quyết vấn đề: “Nhập số tự nhiên n rồi tính tổng: S = 1 + 2 + … + n“.
Để giải quyết vấn đề này có nhiều cách khác nhau: sử dụng vòng lặp, sử dụng công thức toán học. Trong cả hai cách chúng ta đều nhận được kết quả như nhau. Thuật toán và các bước thực hiện cụ thể như sau:
Với cách sử dụng vòng lặp
- Khởi tạo biến tổng sum = 0, biến chạy i = 1
- Dùng vòng lặp for cho i chạy từ 1 đến n, cộng giá trị i vào tổng: sum += i
- hiện kết quả sum
Với cách sử dụng công thức toán
- Công thức tính cấp số cộng của bài này là: s = n(n+1)/2.
- in ra kết quả
Sau đây là chương trình thực hiện trên ngôn ngữ lập trình C:
Như vậy chúng ta đã giải quyết xong vấn đề này rồi. Nếu có ý kiến đóng góp hay câu hỏi nào bạn hãy để lại phía dưới phần commnet nhé.
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29 Comments
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