What does sum mean in c++

In C, the sum function is used to calculate the sum of a list of numbers. It is a generic function that can handle various types of numbers. The usage is sum({a, b, c, ...}), where a, b, c, etc. are the numbers to be summed.

sum in C

In the C programming language, sum is a built-in function that calculates the sum of a series of numbers. It is a generic function that can handle various types of numbers, including integers, floating point numbers, and double precision floating point numbers.

Syntax

##sum(initializer_list)

Among them,

initializer_list is to be calculated A list of numbers whose sum, T is the type of number.

Usage

To use the sum function, you can use the following syntax:

<code class="cpp">sum({a, b, c, ...});</code>

Where,

a, b, c, etc. are number.

Example

The following code example demonstrates the use of the sum function:

<code class="cpp">#include <iostream>
#include <numeric>

int main() {
  // 计算整数列表的和
  int a[] = {1, 2, 3, 4, 5};
  int sum_int = std::accumulate(a, a + 5, 0);

  // 计算浮点数列表的和
  float b[] = {1.2, 2.3, 3.4, 4.5, 5.6};
  float sum_float = std::accumulate(b, b + 5, 0.0f);

  // 输出结果
  std::cout << "整数列表的和：" << sum_int << std::endl;
  std::cout << "浮点数列表的和：" << sum_float << std::endl;

  return 0;
}</code>

Output:

<code>整数列表的和：15
浮点数列表的和：17.000000</code>

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