How do I use std::accumulate and reduce in C++?

C++ provides powerful algorithms for aggregating values, such as `std::accumulate` and `std::reduce`. These functions are part of the `` header and are useful for summing items or performing other operations on collections.

Using std::accumulate

The `std::accumulate` function is used to compute the sum of elements in a range, but it can also be used to implement other operations like multiplication, concatenation, etc.

Example of std::accumulate:


#include <numeric>
#include <vector>
#include <iostream>

int main() {
    std::vector numbers = {1, 2, 3, 4, 5};
    int sum = std::accumulate(numbers.begin(), numbers.end(), 0);
    std::cout << "Sum: " << sum << std::endl;
    return 0;
}

Using std::reduce

The `std::reduce` function (introduced in C++17) is similar to `std::accumulate`, but it allows parallel execution and is generally used for more complex cases.

Example of std::reduce:


#include <numeric>
#include <vector>
#include <iostream>

int main() {
    std::vector numbers = {1, 2, 3, 4, 5};
    int sum = std::reduce(numbers.begin(), numbers.end(), 0);
    std::cout << "Sum: " << sum << std::endl;
    return 0;
}

std::accumulate std::reduce C++ algorithms numeric header

How do I use std::accumulate and reduce in C++?

Using std::accumulate

Example of std::accumulate:

Using std::reduce

Example of std::reduce:

Popular Topics

Recent Languages

How do I use std::accumulate and reduce in C++?

Using std::accumulate

Example of std::accumulate:

Using std::reduce

Example of std::reduce:

Related Questions

Popular Topics

Recent Languages