accumulate() in c++

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DeadHack420 answered on May 6, 2020 Popularity 10/10 Helpfulness 3/10

answer accumulate() in c++

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accumulate() in c++

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accumulate(first, last, sum);
first, last : first and last elements of range 
              whose elements are to be added
              suppose array is 'a'.
sum :  initial value of the sum
Eg: int sum=0;
	accumulate(a.begin(),a.end(),sum);

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Contributed on Jul 26 2020

DeadHack420

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#include <numeric> // Accumulate
#include <vector> // Vector 
using namespace std;

int main()
{
  vector<int> nums{1,2,3,4,5};
  int sum = 0;
  sum = accumulate(nums.begin(), nums.end(), sum);
  // nums.begin() -> first number in a list 
  // nums.end() -> last number in a list 
  // sum -> starting value before accumulating: Here its 0
}

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Contributed on Jul 28 2020

intricate_symbol

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accumulate in cpp

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    accumulate(start, end, initial_sum);

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Contributed on May 06 2020

Sleepy Shark

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accumulate c++

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// C++ program to demonstrate working of accumulate()
#include <iostream>
#include <numeric>
using namespace std;
 
// User defined function
int myfun(int x, int y)
{
    // for this example we have taken product
    // of adjacent numbers
    return x * y;
}
 
int main()
{
    // Initialize sum = 1
    int sum = 1;
    int a[] = { 5, 10, 15 };
 
    // Simple default accumulate function
    cout << "\nResult using accumulate: ";
    cout << accumulate(a, a + 3, sum);
 
    // Using accumulate function with
    // defined function
    cout << "\nResult using accumulate with"
            "user-defined function: ";
    cout << accumulate(a, a + 3, sum, myfun);
 
    // Using accumulate function with
    // pre-defined function
    cout << "\nResult using accumulate with "
            "pre-defined function: ";
    cout << accumulate(a, a + 3, sum, std::minus<int>());
 
    return 0;
}

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Contributed on Aug 23 2022

Surbhi Kumari

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accumulate function in c++

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// C++ program to find the sum
// of Array using accumulate() in STL
 
#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    // Get the vector
    vector<int> a = { 1, 45, 54, 71, 76, 12 };
 
    // Print the vector
    cout << "Vector: ";
    for (int i = 0; i < a.size(); i++)
        cout << a[i] << " ";
    cout << endl;
 
    // Find the sum of the vector
    cout << "\nSum = "
         << accumulate(a.begin(), a.end(), 0);
    return 0;
}

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Contributed on Feb 13 2023

Ifza Gul

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accumulate() in c++

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