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count frequency of each element in an array

Tushar Chakravarti answered on August 19, 2022 Popularity 9/10 Helpfulness 2/10

answer count frequency of each element in an array

count frequency of each element in an array

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// CPP program to count frequencies of array items
#include <bits/stdc++.h>
using namespace std;
  
void countFreq(int arr[], int n)
{
    // Mark all array elements as not visited
    vector<bool> visited(n, false);
  
    // Traverse through array elements and
    // count frequencies
    for (int i = 0; i < n; i++) {
  
        // Skip this element if already processed
        if (visited[i] == true)
            continue;
  
        // Count frequency
        int count = 1;
        for (int j = i + 1; j < n; j++) {
            if (arr[i] == arr[j]) {
                visited[j] = true;
                count++;
            }
        }
        cout << arr[i] << " " << count << endl;
    }
}
  
int main()
{
    int arr[] = { 10, 20, 20, 10, 10, 20, 5, 20 };
    int n = sizeof(arr) / sizeof(arr[0]);
    countFreq(arr, n);
    return 0;
}

Popularity 9/10 Helpfulness 2/10 Language whatever

Source: www.geeksforgeeks.org

Tags: count each element frequency whatever

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