C++ Primer Plus 代码学习解析（第六章 6.6-6.8）

6.6 more_and.cpp

#include <iostream>
const char* qualify[4] =       // an array of pointers*/
{                               // to strings
    "10,000-meter race.\n",
    "mud tug-of-war.\n",
    "masters canoe jousting.\n",
    "pie-throwing festival.\n"
};
int main()
{
    using namespace std;
    int age;
    cout << "Enter your age in years: ";
    cin >> age;
    int index;

    if (age > 17 && age < 35)
        index = 0;
    else if (age >= 35 && age < 50)
        index = 1;
    else if (age >= 50 && age < 65)
        index = 2;
    else
        index = 3;

    cout << "You qualify for the " << qualify[index];
    // cin.get();
    // cin.get();
    return 0;
}

1. 与上述简单的&&条件不同，本代码添加了if_else条件判断，与&&相结合，在不同的年龄段分别有不同的结果
2. 最终结果不同导致显示储