Welcome to collectivesolver - Programming & Software Q&A. A website you can trust. All programs tested and works. Contact: aviboots(AT)netvision.net.il
BlueHost Web Hosting

Bonsai Boy of New York Bonsai Trees and Accessories

Website Domains Names & Hosting | Domain.com

Ecommerce Software - Best Ecommerce Platform Made for You - Free Trial

DreamHost Web Hosting


Instant Grammar Checker - Correct all grammar errors and enhance your writing

Liquid Web Cloud VPS Hosting

Disclosure We are a professional Programming & Software Q&A website, that receives compensation from some of the links whose we show you with Information. It means that my content may contain affiliate links.

12,336 questions

16,793 answers

573 users

How to find the first repeating element in an array of integers with C

1 Answer

0 votes
#include <stdio.h>

int element_exist(int arr[], int len, int start, int n) { 
    for (int i = start; i <= len; i++) { 
        if (arr[i] == n)
            return 1;
    }
    return 0;
}   

int get_first_repeating_element(int arr[], int len) { 
    
    for (int i = 0; i <= len; i++) { 
        if (element_exist(arr, len, i + 1, arr[i])) 
            return arr[i];
    }
    return -1;
} 
  
int main() 
{ 
    int arr[] = {1, 2, 4, 5, 6, 5, 4, 3, 7}; 
  
    int n = get_first_repeating_element(arr, sizeof(arr) / sizeof(arr[0])); 
    
    if (n != -1) 
        printf("First repeating element is: %i", n); 
    else
        printf("No repeating elements"); 
    
}  




/*
run:

First repeating element is: 4

*/

 




answered May 13, 2019 by avibootz
...