How to delete duplicate elements from an array in c programming language

In this program, you will learn how to delete the duplicate elements from an array in c programming language.

How to delete duplicate elements from an array in c programming language

We have designed this program for beginners for learning purpose. Copy below c program and execute it with c compiler to see the output of the program.

#include<stdio.h>
 
int main() {
   int arr[20], i, j, k, size;
 
   printf("\nPlease enter the array size: ");
   scanf("%d", &size);
 
   printf("\nAcceptable Numbers: ");
   for (i = 0; i < size; i++)
      scanf("%d", &arr[i]);
 
   printf("\nArray with Unique elements: ");
   for (i = 0; i < size; i++) {
      for (j = i + 1; j < size;) {
         if (arr[j] == arr[i]) {
            for (k = j; k < size; k++) {
               arr[k] = arr[k + 1];
            }
            size--;
         } else
            j++;
      }
   }
 
   for (i = 0; i < size; i++) {
      printf("%d ", arr[i]);
   }
 
   return (0);
}

#include<stdio.h>

int main() {

int arr[20], i, j, k, size;

printf("\nPlease enter the array size: ");

scanf("%d", &size);

printf("\nAcceptable Numbers: ");

for (i = 0; i < size; i++)

scanf("%d", &arr[i]);

printf("\nArray with Unique elements: ");

for (i = 0; i < size; i++) {

for (j = i + 1; j < size;) {

if (arr[j] == arr[i]) {

for (k = j; k < size; k++) {

arr[k] = arr[k + 1];

}

size--;

} else

j++;

}

for (i = 0; i < size; i++) {

printf("%d ", arr[i]);

}

return (0);

}

Please enter the array size: 8
Acceptable Numbers: 3 9 5 3 8 9 3
Array with Unique elements: 3 5 8 9

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How to delete duplicate elements from an array in c programming language

How to delete duplicate elements from an array in c programming language

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