C language array rotation

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foreword

This article uses C language to realize the rotation of the array (right rotation)

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1. Array rotation

1. Effect

If there is an array value: 1 2 3 4 5, then its rotation effect is:

2. Code

//数组旋转
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define N 10
//旋转数组
void rotate(int arr[], int sz, int n)   //两个临时变量
{
    
    
	
		for (int i = 0; i < n%sz; i++)//旋转次数
		{
    
    
			int a = arr[sz - 1];
			for (int j = 0; j < sz; j++)
			{
    
    
				int temp = arr[j];
				arr[j] = a;
				a = temp;
			}

		}

}
//随机初始化数组
void Initarr(int arr[],int a)
{
    
    
	srand((unsigned)time(NULL));
	
	printf("随机初始化数组共%d个数(范围是0~100).\n", a);

	for (int i = 0; i < a; i++)
	{
    
    

		arr[i] = rand() % 100;

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

	}
	printf("\n");
}
int main()
{
    
    
	int n = 0;
	int arr[N];
	Initarr(arr,N);
	printf("请输入要旋转的次数：\n");
	scanf_s("%d", &n);//VS编译器scanf——>scanf_s
    rotate(arr, N,n);
	printf("旋转结果：\n");
	for (int j = 0; j <N; ++j)
		{
    
    
			printf("%d ", arr[j]);
		}
	
	return 0;
}

3. Running results

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2. Process analysis

1. Randomly read data

2. Array rotation

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Summarize

That's all for this article.