C++ Primer 第四版课后练习解答 习题1.18

注意：本随笔是直接参考《C++Primer（第四版）习题解答（完整版）》中的。此处主要是便于本人以后反复阅读。

习题1.18

编写程序，提示用户输入两个数并将这两个数范围内的每个数写到标准输出。

【解答】

 while循环实现

#include <iostream>
using namespace std;

int main()
{
    int v1, v2, low,up;
    cout << "Enter tow numbers " << endl;
    cin >> v1 >> v2;
    if (v1 < v2)
    {
        low = v1;
        up = v2;
    }
    else
    {
        low = v2;
        up = v1;
    }
    cout << "Values of " << low << " to " << up << " inclusive are: " << endl;
    while (up >= low)
        cout << low++ << " ";
    cout << endl;
    return 0;
}

 for循环实现

#include <iostream>
using namespace std;

int main()
{
    int v1, v2, low,up;
    cout << "Enter tow numbers " << endl;
    cin >> v1 >> v2;
    if (v1 < v2)
    {
        low = v1;
        up = v2;
    }
    else
    {
        low = v2;
        up = v1;
    }
    cout << "Values of " << low << " to " << up << " inclusive are: " << endl;
    for (int val = low; val <= up; ++val)
        cout << val << " ";
    cout << endl;
    return 0;
}