在 C 中输入数组并检查相同的值

Question

how I can input an array of integers and check if 2 pairs of values are equal and I also want to remove the duplicated to have only 1 same value in array? I want to print the final result of the array without the duplicated values in it. I have something like this in mind:

int a[SIZE], i;
 printf("Enter %d numbers:\n", SIZE);
 for (i = 0; i < SIZE; i++) {
  scanf_s("%d", a[i]);
 if(i>=1){
  if(a[i-1]==a[i]){
  a[i-1]==a[i];
  printf("%d", a[i-1]);
 }
}

this result gives me what I need but not completely. can you assist with this?

Answer 1

Code

#include<stdio.h>
int main() {
   int arr[20], i, j, k, size;
   printf("\nEnter array size:");
   scanf("%d", &size);
   printf("\nEnter Numbers:");
   for (i = 0; i < size; i++)
      scanf("%d", &arr[i]);
   printf("\nList of Unique Numbers:");
   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]);
   }
}

Explanation

After inputting, we start from the first element. Then within that for loop, we have another for loop to check elements after that element. If there is a duplicate, I remove it. Hope this helps!