Find number of occurrences of an element in an array

Posted on Apr 24, 2020

C program to find number of occurrences of an element in one dimensional array.

Program

#include<stdio.h>
#include<conio.h>
#define MAX 50

void read_array(int a[MAX], int n)
{
    int i;
    for(i=0;i<n;i++)
    {
        printf("Element %d\t:",i+1);
        scanf("%d",&a[i]);
    }
}

int occ_ele(int a[MAX], int n, int num)
{
    int i, count;

    count = 0;
    for(i=0;i<n;i++)
    {
        if(a[i] == num)
            count++;
    }

    return(count);
}

void main()
{
    int arr[MAX];
    int i, n, count, num;

    printf("Enter the number of elements in the array\t:");
    scanf("%d",&n);

    printf("Enter the elements of the array\n");
    read_array(arr, n);

    printf("Enter the element whose number of occurrences is to be found\t:");
    scanf("%d",&num);

    count = occ_ele(arr, n, num);
    printf("\n%d occur %d number of times in the array",num,count);

    getch();
}

Output

Enter the number of elements in the array       :5
Enter the elements of the array
Element 1       :1
Element 2       :2
Element 3       :1
Element 4       :2
Element 5       :3
Enter the element whose number of occurrences is to be found    :1

1 occur 2 number of times in the array