【期末不挂科-C++考前速过系列P6】大二C++实验作业-模板（4道代码题）【解析，注释】

//程序1. 编写一个函数模板，求数组中的最大元素，并写出调用此函数模板的完整程序，使得函数调用时，数组的类型可以是整型，也可以是双精度类型。

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
using namespace std;


template<typename T>
T findMax(T arr[], int size)
{
	T max = arr[0];
	for (int i = 0; i < size; i++)
	{
		if (arr[i] > max)
		{
			max = arr[i];
		}
	}
	return max;
}

int main()
{
	int arr1[] = { 1,2,3,4,5,6 };
	double arr2[] = { 1.1,1.2,1.3,1.4 };

	int a = findMax(arr1,6);
	double b= findMax(arr2, 4);

	cout << a << endl;
	cout << b << endl;


	return 0;

}

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
using namespace std;

template <typename T>
void bubbleSort(T arr[], int size)
{
    for (int i = 0; i < size - 1; i++)
    {
        for (int j = 0; j < size -1- i; j++)
        {
            if (arr[j] > arr[j + 1])
            {
                T tmp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = tmp;
            }
        }
    }
   
}
template <typename T>
void printArray(T arr[], int size) 
{
    for (int i = 0; i < size; i++)
    {
        cout << arr[i]<<" ";
    }
    cout  << endl;
}

int main() {
    int arr1[] = { 6,1,2,3,4,5};
    double arr2[] = { 1.4,1.1,1.2,1.3};

    bubbleSort(arr1, 6);
    bubbleSort(arr2, 4);

    printArray(arr1, 6);
    printArray(arr2, 4);

    return 0;
}

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
using namespace std;

template <typename T>
class SumOfThree {
public:
    SumOfThree(T num1, T num2, T num3)
        : _num1(num1), _num2(num2), _num3(num3)
    {}

    T sum() {
        return _num1 + _num2 + _num3;
    }

private:
    T _num1,_num2,_num3;
};

int main() {
    SumOfThree<int> intSum(1, 2, 3);
   
    SumOfThree<double> doubleSum(1.1, 1.2, 1.3);

    cout <<intSum.sum() << endl;
    cout <<doubleSum.sum() << endl;

    return 0;
}

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
using namespace std;

template <typename T>
class SumOfThree {
public:
    SumOfThree(T num1, T num2, T num3)
        : _num1(num1), _num2(num2), _num3(num3)
    {}

    T sum();

private:
    T _num1, _num2, _num3;
};

template <typename T>//类模板中的函数放在类外进行定义时，需要加模板参数列表
T SumOfThree<T>::sum()//用类型访问
{
    return _num1 + _num2 +_num3;
}


int main() {
    SumOfThree<int> intSum(1, 2, 3);

    SumOfThree<double> doubleSum(1.1, 1.2, 1.3);

    cout << intSum.sum() << endl;
    cout << doubleSum.sum() << endl;

    return 0;
}