编写一个C ++函数，接受一维数组并计算元素的总和并显示它(Write a C++ function that accepts a 1-D array and calculates the sum of the elements, and displays it)

我想创建一个定义1d数组的函数，计算元素的总和，并显示该总和。 我写了下面的代码，但是我不知道使用指针和其他高级编码技术。

#include <iostream> using namespace std; int main() { int size; int A[]; cout << "Enter an array: \n"; cin << A[size]; int sum; int sumofarrays(A[size]); sum = sumofarrays(A[size]); cout << "The sum of the array values is: \n" << sum << "\n"; } int sumofarrays(int A[size]) { int i; int j = 0; int sum; int B; for (i=0; i<size; i++) { B = j + A[i]; j = B; } sum = B; return(sum); }

试图编译此代码时，出现以下错误：

SumOfArrays.cpp：19：18：错误：调用对象类型'int'不是函数或函数指针sum = sumofarrays（size）

I wanted to create a function that would define an 1d Array, calculate a sum of the elements, and display that sum. I wrote the following code however I'm unaware of the use of pointers and other advanced techniques of coding.

#include <iostream> using namespace std; int main() { int size; int A[]; cout << "Enter an array: \n"; cin << A[size]; int sum; int sumofarrays(A[size]); sum = sumofarrays(A[size]); cout << "The sum of the array values is: \n" << sum << "\n"; } int sumofarrays(int A[size]) { int i; int j = 0; int sum; int B; for (i=0; i<size; i++) { B = j + A[i]; j = B; } sum = B; return(sum); }

When attempting to compile this code, I get following error:

SumOfArrays.cpp:19:18: error: called object type 'int' is not a function or function pointer sum = sumofarrays(size)

最满意答案

如果只有你为你的数据使用了像std::vector<int&t; A这样的容器 。 那么你的总和会退出：

int sum = std::accumulate(A.begin(), A.end(), 0);

每个专业程序员都会立即明白你想要做什么。 这有助于使您的代码可读和可维护。

开始使用C ++标准库。 阅读一本像Stroustrup这样的好书。

If only you had used a container like std::vector<int> A for your data. Then your sum would drop out as:

int sum = std::accumulate(A.begin(), A.end(), 0);

Every professional programmer will then understand in a flash what you're trying to do. That helps make your code readable and maintainable.

Start using the C++ standard library. Read a good book like Stroustrup.

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