C++ std::reduce 与数组

Question

int arr1[5] = { 1,2,3,4,5 };
int sum = reduce(arr1[0], arr1[5]);

我编写此代码是为了将 std::reduce 函数与整数数组一起使用。我应该如何定义数组的开头和结尾？

Answer 1

使用std::cbegin()和 std::cend()在数组上:

#include <iostream>
#include <numeric>
int main(){
    int arr1[5] = { 1,2,3,4,5 };
    int sum = std::reduce(std::cbegin(arr1), std::cend(arr1));
    std::cout << sum;
}

Demo