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C++ - Đánh giá hạng học sinh dựa vào điểm số
STARTING
CONTROL STATEMENT
FUNCTION
ARRAY & POINTER
OOP
STL
ITERATORS
OTHER FEATURES
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
C++ - Đánh giá hạng học sinh dựa vào điểm số
Viết một chương trình đánh giá xếp hạng học sinh dựa vào các điểm (điểm kiểm tra miệng (ktm), điểm kiểm tra 15 phút (kt15), điểm kiểm tra 1 tiếng (kt60), điểm kiểm tra cuối kỳ (ktck)). Công thức tính xếp hạng học sinh như sau:
DTB = (ktm + kt15 + kt60*2 + ktck*2)/6.
Nếu DTB lớn hơn hoặc bằng 9, xếp loại giỏi
Nếu DTB nhỏ hơn 9 và lớn hơn hoặc bằng 7, xếp loại khá
Nếu DTB nhỏ hơn 7 và lớn hơn hoặc bằng 7, xếp loại trung bình
Nếu DTB nhỏ hơn 5 xếp loại yếu
Bài giải
-------------------- ######## --------------------
Cách giải bài toán trên như sau:
Bài viết này được đăng tại freetuts.net , không được copy dưới mọi hình thức.
Nhập 4 số từ bàn phím cho 4 giá trị đó là kiểm tra miệng, kiểm tra 15 phút, kiểm tra 1 tiếng, kiểm tra cuối kỳ
Gán giá trị cho biến giữ giá trị điểm trung bình, được tính theo công thức của bài toán
Dùng cấu trúc điều khiển if else trong C++ kiểm tra từng điều kiện như yêu cầu của bài toán trên để xếp hạng học sinh
Chương trình dùng cấu trúc điều khiển if else trong C++ để giải quyết bài toán trên như sau:
#include <iostream>
#include<iomanip>
using namespace std;
int main(int argc, char *argv[])
{
float dm;
float d15;
float d60;
float df;
float avg;
cout << "Nhap diem kiem tra mieng: ";
cin >> dm;
cout << "Nhap diem kiem tra 15 phut: ";
cin >> d15;
cout << "Nhap diem kiem tra 1 tieng: ";
cin >> d60;
cout << "Nhap diem kiem tra cuoi ky: ";
cin >> df;
avg = (dm + d15 + d60*2 + df*2)/6;
if(avg >= 9) {
cout << "Gioi";
} else if((avg >= 7) && (avg < 90)) {
cout << "Kha";
} else if((avg >= 5) && (avg < 7)) {
cout << "Trung Binh";
} else if(avg < 5) {
cout << "Yeu";
} else {
cout << "Diem khong hop le";
}
return 0;
}
Và kết quả sau khi thực thi đoạn code trên như sau:
Bài viết này được đăng tại [free tuts .net]
8. Bài tập if else C++
Cùng chuyên mục: