This C Program uses recursive function & finds the occurrence for an element in an unsorted list. The user enters the element need to be counted.
Here is the source code of the C program to find the number of occurrences of a given number in a list. The C Program is successfully compiled and run on a Linux system. The program output is also shown below.
/*
* C program to find the number of occurences of a given number in a
* list
*/
#include <stdio.h>
void occur(int [], int, int, int, int *);
int main()
{
int size, key, count = 0;
int list[20];
int i;
printf("Enter the size of the list: ");
scanf("%d", &size);
printf("Printing the list:\n");
for (i = 0; i < size; i++)
{
list[i] = rand() % size;
printf("%d ", list[i]);
}
printf("\nEnter the key to find it's occurence: ");
scanf("%d", &key);
occur(list, size, 0, key, &count);
printf("%d occurs for %d times.\n", key, count);
return 0;
}
void occur(int list[], int size, int index, int key, int *count)
{
if (size == index)
{
return;
}
if (list[index] == key)
{
*count += 1;
}
occur(list, size, index + 1, key, count);
}
$ cc pgm13.c $ a.out Enter the size of the list: 7 Printing the list: 1 4 2 5 1 3 3 Enter the key to find it's occurence: 3 3 occurs for 2 times.
Sanfoundry Global Education & Learning Series – 1000 C Programs.
advertisement
Here’s the list of Best Books in C Programming, Data-Structures and Algorithms
If you wish to look at other example programs on Linked List, go to Linked List. If you wish to look at programming examples on all topics, go to C Programming Examples.
Related Posts:
- Check Programming Books
- Practice Computer Science MCQs
- Practice Programming MCQs
- Practice Design & Analysis of Algorithms MCQ
- Apply for Computer Science Internship