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C++ 程序:生成乘法表

原文: https://www.programiz.com/cpp-programming/examples/multiplication-table

使用for循环生成数字(由用户输入)的乘法表的示例。

要理解此示例,您应该了解以下 C++ 编程主题:


示例 1:显示最多 10 个乘法表

#include <iostream>
using namespace std;

int main()
{
    int n;

    cout << "Enter a positive integer: ";
    cin >> n;

    for (int i = 1; i <= 10; ++i) {
        cout << n << " * " << i << " = " << n * i << endl;
    }

    return 0;
}

输出

Enter an integer: 5
5 * 1 = 5
5 * 2 = 10
5 * 3 = 15
5 * 4 = 20
5 * 5 = 25
5 * 6 = 30
5 * 7 = 35
5 * 8 = 40
5 * 9 = 45
5 * 10 = 50 

上面的程序最多只能计算 10 个乘法表。

下面的程序是对上面程序的修改,其中还要求用户输入显示乘法表的范围。

示例 2:显示到给定范围的乘法表

#include <iostream>
using namespace std;

int main()
{
    int n, range;

    cout << "Enter an integer: ";
    cin >> n;

    cout << "Enter range: ";
    cin >> range;

    for (int i = 1; i <= range; ++i) {
        cout << n << " * " << i << " = " << n * i << endl;
    }

    return 0;
}

输出

Enter an integer: 8
Enter range: 12
8 * 1 = 8
8 * 2 = 16
8 * 3 = 24
8 * 4 = 32
8 * 5 = 40
8 * 6 = 48
8 * 7 = 56
8 * 8 = 64
8 * 9 = 72
8 * 10 = 80
8 * 11 = 88
8 * 12 = 96