批量修改当前目录下的jpg文件名为从0-N.jpg

 当然，你也可以按自己想要的修改，代码来自AI

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>


int stringToInt(char *s)
{
	int res = 0;
	int flag = 0;

	while(*s != '\0' && (*s < '0' || *s > '9'))s++;
	while(*s != '\0' && *s >= '0' && *s <= '9')
	{
		flag = 1;
		res *= 10;
		res += (*s - '0');
		s++;
	}
	if(flag)
	{
		return res;
	}
	return -1;
}


void main(void)
{

	
	printf("'''\n");
	printf("\n");
	printf("    ┏┓      ┏┓+ +\n");
	printf("  ┏┛┻━━━┛┻┓ + +\n");
	printf("  ┃              ┃   \n");
	printf("  ┃      ━      ┃ ++ + + +\n");
	printf(" ████━████ ┃+\n");
	printf("  ┃              ┃ +\n");
	printf("  ┃      ┻      ┃\n");
	printf("  ┃              ┃ + +\n");
	printf("  ┗━┓      ┏━┛\n");
	printf("      ┃      ┃                      \n");
	printf("      ┃      ┃ + + + +\n");
	printf("      ┃      ┃\n");
	printf("      ┃      ┃ +  神兽保佑\n");
	printf("      ┃      ┃    代码无bug    \n");
	printf("      ┃      ┃    +                  \n");
	printf("      ┃       ┗━━━┓ + +\n");
	printf("      ┃               ┣┓\n");
	printf("      ┃               ┏┛\n");
	printf("      ┗┓┓┏━┳┓┏┛ + + + +\n");
	printf("        ┃┫┫  ┃┫┫\n");
	printf("        ┗┻┛  ┗┻┛+ + + +\n");
	printf("\n");
	printf("'''\n");

	printf("It's my honor to see you again!\n");

	const char imageSuffix[4][10]=
	{
		".jpg",
		".jpg",
		".bmp",
		".png",
	};

	DIR *dir;
    struct dirent *ent;
    int fileCount = 0;
    char oldFileName[500][256];
    char newFileName[256];
	int imageSuffixIndex;
	//int needSort = 0;
	int startIndex = 0;

    dir = opendir(".");
	printf("Please input 1or2or3 : 1:jpg ; 2:bmp ; 3:png ;\n");
	scanf("%d",&imageSuffixIndex);
	//printf("Do you need sort? : 1:yes ; 0:no;\n");
	//scanf("%d",&needSort);
	printf("Please input index,range : 0~N\n");
	scanf("%d",&startIndex);
	if(imageSuffixIndex <= 3)
	{
		fileCount = startIndex;
		int len = 0;
		if(dir== NULL)
		{
			perror("opendir");
			system("pause");
			return ;
		}
		len=0;
		while ((ent = readdir(dir))!= NULL) {
			const char *extension = strrchr(ent->d_name, '.');
			if (extension && strcmp(extension, imageSuffix[imageSuffixIndex]) == 0) {
				sprintf(oldFileName[len], "%s", ent->d_name);
				len++;
			}
		}
		closedir(dir);
		
		//if(needSort)
		//{
			for(int i=0;i<len;i++)
			{
				int t = stringToInt(oldFileName[i]);
				if(t != -1)
				{
					char tempstr[256];
					int j = 0;
					int m = 0;
					while(oldFileName[i][m] != '\0' && (oldFileName[i][m] < '0' || oldFileName[i][m] > '9'))
					{
						tempstr[j] = oldFileName[i][m];
						j++;
						m++;
					}
					tempstr[j++] = t/10000+'0';t %= 10000;
					tempstr[j++] = t/1000+'0';t %= 1000;
					tempstr[j++] = t/100+'0';t %= 100;
					tempstr[j++] = t/10+'0';t %= 10;
					tempstr[j++] = t+'0';
					while(oldFileName[i][m] != '\0' && oldFileName[i][m] >= '0' && oldFileName[i][m] <= '9')m++;
					while(oldFileName[i][m] != '\0')
					{
						tempstr[j] = oldFileName[i][m];
						j++;
						m++;
					}
					tempstr[j] = '\0';
					printf("rename:%s -> %s\n",oldFileName[i],tempstr);
					rename(oldFileName[i], tempstr);
				}
			}
		//}

		dir = opendir(".");
		if(dir== NULL)
		{
			perror("opendir");
			system("pause");
			return ;
		}
		len = 0;
		while ((ent = readdir(dir))!= NULL) {
			const char *extension = strrchr(ent->d_name, '.');
			if (extension && strcmp(extension, imageSuffix[imageSuffixIndex]) == 0) {
				sprintf(oldFileName[len], "%s", ent->d_name);
				len++;
			}
		}
		for(int i=0;i<len;i++)
		{
			sprintf(newFileName, "%d%s", fileCount,imageSuffix[imageSuffixIndex]);
			rename(oldFileName[i], newFileName);
			printf("%s  -> %s\n",oldFileName[i],newFileName);
			fileCount++;
		}
		closedir(dir);
	}
	else
	{
		printf("Error!\n");
	}
	
	system("pause");
}