批量修改图片后缀

char name[200];
char saveName[200];
for (int i=1;i<=516;i++)
{
sprintf(name,"C:\\Users\\Administrator\\Desktop\\Harr\\data\\cars128x128\\car_%04d.ppm",i);
sprintf(saveName,"C:\\Users\\Administrator\\Desktop\\Harr\\data\\cars128x128\\%04d.bmp",i);
IplImage *img=cvLoadImage(name);
if (img)
{
cvNamedWindow("res");
cvShowImage("res",img);
cvWaitKey(10);
cvSaveImage(saveName,img);
}
}