【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