【C++ Primer Plus习题】8.7

问题:

解答:

#include <iostream>

using namespace std;

template <typename T>
T SumArray(T arr[], int n)
{
	T sum = arr[0] - arr[0];
	for (int i = 0; i < n; i++)
	{
		sum += arr[i];
	}
	return sum;
}

template <typename T>
T SumArray(T *arr[], int n)
{
	T sum = *arr[0]-*arr[0];
	for (int i = 0; i < n; i++)
	{
		sum += *arr[i];
	}
	return sum;
}

struct debts
{
	char name[50];
	double amount;
};

int main()
{
	int things[6] = { 13,31,103,301,310,130 };
	struct debts mr_E[3]=
	{
		{"Ima Wolfe",2400.0},
		{"Ura Foxe",1300.0},
		{"Iby Stout",1800.0}
	};
	double* pd[3];
	for (int i = 0; i < 3; i++)
	{
		pd[i] = &mr_E[i].amount;
	}
	cout << "things的总数为:" << SumArray(things, 6) << endl;
	cout << "debts的总数为:" << SumArray(pd, 3) << endl;


	return 0;
}

运行结果:

考查点:

• 模版函数重载

注意:

• 不知道具体类型,可以自己减自己赋初始值
  

2024年9月1日22:22:56