Quelqu'un de disponible pour m'aider dans des exercices c++ ?

#include <vector>
#include <iostream>


void sum(const std::vector<double>& x,
		 const std::vector<double>& y,
		std::vector<double>& z){
	for(std::size_t i = 0; i < x.size(); ++i)
		z[i] = x[i] + y[i];
}

int main() {
	const unsigned n = 10;
	std::vector<double> x(n),y(n),z(n);
	for(size_t i = 0; i < n; ++i){
		x[i]=2.*i/n;
		y[i]=5.*i/n;
	}
	sum(x,y,z);
	
	std::cout << "sum(x,y) = [";
	for(unsigned i = 0; i < n ; ++i)
		std::cout << z[i] << " " ;
	std::cout << "]" << std::endl;
	
	return 0;
}

#ifndef SUM_H
#define SUM_H

void sum(const std::vector<double>& x,
		 const std::vector<double>& y,
		std::vector<double>& z){
	for(std::size_t i = 0; i < x.size(); ++i)
		z[i] = x[i] + y[i];
}

#ifdef 

#define 

#endif