【C++ Primer Plus习题】16.5

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问题:

解答:

#include <iostream>
#include <list>
using namespace std;

template<typename T>
int reduce(T ar[], int n)
{
	list<T>ls;
	ls.insert(ls.end(), ar, ar + n);
	ls.sort();
	ls.unique();
	auto pd = ls.begin();
	for (int i = 0; i < ls.size(); i++, pd++)
	{
		*(ar + i) = *pd;
	}
	return ls.size();
}

int main()
{
	long ar[5] = { 45000,3400,45000,100000,2500 };
	int resize = reduce(ar, 5);
	cout << "array: \n";
	for (int i = 0; i < resize; i++)
	{
		cout << ar[i] << " ";
	}

	string ar2[6] = { "it","aboard","it","zone","quit","aa" };
	resize = reduce(ar2, 6);
	cout << "\narray2: \n";
	for (int i = 0; i < resize; i++)
	{
		cout << ar2[i] << " ";
	}

	return 0;
}

运行结果:

考查点:

• 模板函数
• list容器

2024年9月17日20:34:04