learning poash templates ex1

#if defined(_MSC_VER)
#include <__msvc_all_public_headers.hpp>
#elif defined(__GNUC__)
#include <bits/stdc++.h>
#else
#error "Unsupported compiler"
#endif
using namespace std;

template<typename T>
T Add(const T& a, const T& b) {
    return a + b;
}

template<typename T>
T ArraySum(const T* pArr, size_t arrSize) {
    T sum = T();
    for (int i = 0; i < arrSize; ++i) {
        sum = Add(sum, pArr[i]);
    }
    return sum;
}

template<typename T>
T Max(const T* pArr, size_t arrSize) {
    if (arrSize == 0) {
        throw invalid_argument("Array is empty");
    }
    T max = pArr[0];
    for (int i = 1; i < arrSize; ++i) {
        if (pArr[i] > max) {
            max = pArr[i];
        }
    }
    return max;
}

int main() {
    int arr[] = { 1, 2, 3, 4, 5 };
    cout << ArraySum(arr, 5) << endl;
    cout << Max(arr, 5) << endl;

    string arr2[] = { "abc", "def", "ghi" };
    cout << ArraySum(arr2, 3) << endl;
    cout << Max(arr2, 3) << endl;

    double arr3[] = { 1.1, 2.2, 3.3, 4.4, 5.5 };
    cout << ArraySum(arr3, 5) << endl;
    cout << Max(arr3, 5) << endl;

    return 0;
}