C++ 函数模板[Function Template]

#include 
using namespace std;


//书写函数模板
template void Sort(T tArray[], int len);
template void Show(T tArray[], int len);


template 
void Sort(T tArray[], int len) {
	T temp;

	for (int i = 0; i < len - 1; i++) {
		for (int j = 0; j < len - i - 1; j++) {
			if (tArray[j] < tArray[j + 1]) {
				temp = tArray[j];
				tArray[j] = tArray[j + 1];
				tArray[j + 1] = temp;
			}
		}
	}
}


template
void Show(T tArray[], int len) {
	for (int i = 0; i < len - 1; i++) {
		cout << tArray[i] << ", ";
	}
	cout << endl;
}

int main(){

	int iNums[] = { 56 ,47, 13, 89, 32 };
	float fNums[] = { 10.8f, 28.6f, 35.5f, 50.2f, 99.9f };
	double dNums[] = { 70.8, 65.9, 22.2, 84.3, 53.4 };

	cout << "排序前：" ;
	Show(iNums, sizeof(iNums) / sizeof(iNums[0]));
	Sort(iNums, sizeof(iNums) / sizeof(iNums[0]));
	cout << "排序后：" ;
	Show(iNums, sizeof(iNums) / sizeof(iNums[0]));

	cout << endl;

	cout << "排序前：";
	Show(fNums, sizeof(fNums) / sizeof(fNums[0]));
	Sort(fNums, sizeof(fNums) / sizeof(fNums[0]));
	cout << "排序后：";
	Show(fNums, sizeof(fNums) / sizeof(fNums[0]));

	cout << endl;

	cout << "排序前：";
	Show(dNums, sizeof(dNums) / sizeof(dNums[0]));
	Sort(iNums, sizeof(dNums) / sizeof(dNums[0]));
	cout << "排序后：";
	Show(dNums, sizeof(dNums) / sizeof(dNums[0]));
}

输出结果：