subscripted value is neither array nor pointer nor vector in c -


how remove error tried everything.... program finding 5 closest number array... in main part take array, num , size , passes through function 

void printclosest(int arr[], int x, int n) { int diff[30]; int i,j,k,p,a;  (i = 0; < n; ++i)     {         (j = + 1; j < n; ++j)         {             if (arr[i] > arr[j])             {                 =  arr[i];                 arr[i] = arr[j];                 arr[j] = a;             }         }     }  for(i=0;i<n;i++) { diff[i]=abs(a[i]-x);  }   (k = 0; k < n; ++k)     {         (p = k + 1; p < n; ++p)         {             if (diff[k] > diff[p])             {                 =  arr[k];                 arr[k] = arr[p];                 arr[p] = a;             }         }     }     for(i=0;i<5;i++)   { printf("%d",arr[i]);    }     }

a declared int, yet try use array here:

diff[i]=abs(a[i]-x);

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