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C++ - Tìm số lớn nhất trong 3 số được nhập từ bàn phím.
STARTING
CONTROL STATEMENT
FUNCTION
ARRAY & POINTER
OOP
STL
ITERATORS
OTHER FEATURES
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
C++ - Tìm số lớn nhất trong 3 số được nhập từ bàn phím.
Tìm số lớn nhất trong 3 số được nhập từ bàn phím.
Bài giải
-------------------- ######## --------------------
Cách giải bài toán này đơn giản như sau:

Bài viết này được đăng tại freetuts.net, không được copy dưới mọi hình thức.
- Lấy một biến tạm giữ giá trị lớn nhất, ta gọi đó là max
- Gán giá trị số đầu tiên cho max, bây giờ max là số đầu tiên
- So sánh max với số thứ 2, nếu số thứ 2 lớn hơn max, gán giá trị max bằng số thứ 2
- So sánh max với số thứ 3, nếu số thứ 3 lớn hơn max, gán giá trị max bằng số thứ 3
Chúng ta sẽ sử dụng cấu trúc điều khiển if else trong C++ để giải quyết bài toán trên như sau:
#include <iostream>
using namespace std;
int main()
{
int a, b, c, max;
cout << "Nhap a = ";
cin >> a;
cout << "Nhap b = ";
cin >> b;
cout << "Nhap c = ";
cin >> c;
max = a;
if(max < b) {
max = b;
}
if(max < c) {
max=c;
}
cout << "So lon nhat trong 3 so " << a << ", " << b << ", " << c << " la: " << max;
return 0;
}
Và kết quả sau khi thực thi chương trình trên như sau:
Khi nhập a = 5, b = 3 và c = 7:
Bài viết này được đăng tại [free tuts .net]

Khi nhập a = 1, b = 5, và c = 2:

Khi nhập a = 6, b = 3, và c = 2:

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