C language: random generated number + selective sorting

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define MAXSIZE 10
void initArr(int arr[] , int length);
void showArr(int arr[] , int length);
void selectSort(int arr[] , int length); 
int main()
{
    
	srand((unsigned int)time(NULL));
	int arr[MAXSIZE];
	printf("========== The sequence before sorting =============\n");
	initArr(arr,MAXSIZE);
	showArr(arr,MAXSIZE);
	printf("========== Select the sorted sequence =============\n");
	selectSort(arr,MAXSIZE); 
	showArr(arr,MAXSIZE);
	system("pause");
	return 0;
} 
void initArr(int arr[] , int length)
{
    
	for(int i = 0 ; i < length ; i++){
    
		arr[i] = rand()%20;
	}
}
void showArr(int arr[] , int length)
{
    
	for(int i = 0 ; i < length ; i++){
    
		printf("%4d",arr[i]);
	}
	printf("\n");
}
void selectSort(int arr[] , int length)
{
    
	// Selection sort  
	for(int i = 0 ; i < length ; i++){
    
		int k = i;
		for(int j = i ; j < length ; j++){
    
			if(arr[k] > arr[j]){
    
				k = j;	
			} 	
		}
		int temp = arr[i];
		arr[i] = arr[k];
		arr[k] = temp;
	}
}