C Exercises: Find the two repeating elements in a given array
C Array: Exercise-44 with Solution
Write a program in C to find the two repeating elements in a given array.
Pictorial Presentation:

Sample Solution:
C Code:
#include<stdio.h>
#include<stdlib.h>
void find2RepetElement (int arr1[], int arr_size)
{
int i, j;
printf("The repeating elements are: ");
for(i = 0; i < arr_size; i++)
for(j = i+1; j < arr_size; j++)
if(arr1[i] == arr1[j])
printf(" %d ", arr1[i]);
}
int main()
{
int arr1[] = {2, 7, 4, 7, 8, 3, 4};
int ctr = sizeof(arr1)/sizeof(arr1[0]);
int i;
//------------- print original array ------------------
printf("The given array is : ");
for(i = 0; i < ctr; i++)
{
printf("%d ", arr1[i]);
}
printf("\n");
find2RepetElement(arr1, ctr);
return 0;
}
Sample Output:
The given array is : 2 7 4 7 8 3 4 The repeating elements are: 7 4
Flowchart:

C Programming Code Editor:
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Next: Write a program in C to find two elements whose sum is closest to zero.
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C Programming: Tips of the Day
C Programming - What is the argument for printf that formats a long?
Put an l (lowercased letter L) directly before the specifier.
unsigned long n; long m; printf("%lu %ld", n, m);
Ref : https://bit.ly/3dIwfkP
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