C语言：随机生成数+冒泡排序

#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 bubsort(int arr[] , int length);
int main()
{
	srand((unsigned int)time(NULL));
	int arr[MAXSIZE];
	printf("==========排序前的序列=============\n");
	initArr(arr,MAXSIZE);
	showArr(arr,MAXSIZE);
	printf("==========排序后的序列=============\n");
	bubsort(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 bubsort(int arr[] , int length)
{
	while(length--){
		for(int i = 0 ; i < length ; i++){
			if(arr[i+1] < arr[i]){
				int temp = arr[i+1];
				arr[i+1] = arr[i];
				arr[i] = temp;
			}
		}
	}
}