44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
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// 请完成以下程序的代码，实现数组的循环迭代
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#include <iostream>
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using namespace std;
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template <typename T>
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class Iterator
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{
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public:
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T *data;
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int size;
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int currentIndex;
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public:
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Iterator(T *d, int s) : data(d), size(s), currentIndex(0) {}
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T getCurrent() // 获取当前元素
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{
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return data[currentIndex];
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}
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void next() // 迭代器前进的代码
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{
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currentIndex = (currentIndex + 1) % size; // 对 size 取余用于循环
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}
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void previous() // 迭代器后退的代码
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{
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currentIndex = (currentIndex - 1 + size) % size; // + size 用于防止负数，对 size 取余用于循环
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}
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};
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int main()
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{
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int *p = new int[5]{1, 2, 3, 4, 5}; // 创建数组
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Iterator<int> it(p, 5); // 创建迭代器对象
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int cnt = 0; // 计数器，用于控制循环次数
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while (cnt++ < 5)
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{
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cout << it.getCurrent() << endl; // 输出当前元素
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it.next(); // 迭代器前进
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}
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return 0;
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}
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