Sum all numbers in a container:

#include <iostream>
#include <vector>
#include <numeric> // for std::accumulate

int main() {
    std::vector<float> numbers = {1, 2, 3, 4, 5};

    // Calculate the sum of elements using std::accumulate
    float sum = std::accumulate(numbers.begin(), numbers.end(), 0.0); //0.0 is initial value

    std::cout << "Sum of elements: " << sum << std::endl;

    return 0;
}

Example of Using inbuilt sort function

int a[4] = {5,9,8,1};

cout<<sizeof(a)/sizeof(int)<<'\n'; //getting size of a


sort(a,a+(sizeof(a)/sizeof(int))); //
for (int var = 0; var < 4; ++var) {
        cout<<a[var]<<",";
}
cout<<"\n";

vector<int> av={55,3,4,2,87};
sort(av.begin(), av.end());

for(auto v: av)
        cout<<v<<",";