I am having problems using the accumulate to find the sum of all elements in a vector. Here is what I have:

#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <fstream>
#include <istream>
#include <string>
#include <vector>
#include <numeric>
using namespace std;

int main()
	vector<float> energy;

	for(int i = 0; i < 25; i++)

	float sum = accumulate(energy.begin(),energy.end(),0);
	cout << "Sum: " << sum << endl;

I would like this program to calculate the sum of all elements in the energy vector. When I try to compile, I get a list of about 50 errors relating to the numeric header file. Can somebody tell me whats wrong with my code please.

One thing to note is that accumulate's third parameter, 0 in this case, makes your result an integer because the function takes that type as its value. Therefore, the fractional part of your code would be disregarded.

Change the 0 to 0.0.

Edited 5 Years Ago by Chilton: n/a

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