技術標籤：C++ Primer Plus巢狀迴圈二維陣列C++C++ Primer Plus

程式清單5.20 nested.cpp

#include <iostream>

const int Cities = 5;
const int Years = 4;

int main()
{
    using namespace std;

    const char * cities[Cities] =			//char cities[Cities][25]; string cities[Cities].
            {
            "Cribble City"
 
,
            "Gribbletown",
            "New Gribble",
            "San Gribble",
            "Gribble Vista"
            };

    int maxtemps[Years][Cities] =
            {
                    {94, 98, 87, 103, 101},
                    {98, 99, 91, 107, 105},
                    {
 
93, 91, 90, 101, 104},
                    {95, 100, 88, 105, 103}
            };

    cout << "Maximum temperatures for 2002-2005\n\n";
    for (int city = 0; city < Cities; ++city)
    {
        cout << cities[city] << ": \t";
        for (int year = 0; year < Years;
 
 ++year)
            cout << maxtemps[year][city] << "\t";
        cout << endl;
    }

    return 0;
}

“在希望字串是可修改的情況下，string類自動調整大小的特性將使這種方法比使用二維陣列更為方便。”