enum IMAGEFORMAT { JPG, BMP}  imageExt;int GetImageFormat(char *ext){	if(!stricmp(ext, "jpg")) imageExt = JPG;	else if( !stricmp(ext, "bmp") )  imageExt = BMP;	else cout<<"未知的图像格式!\n";	return imageExt;}int main(){	char *ext = "bmp";	switch(GetImageFormat(ext))	{	case JPG:		cout<<"图像格式为JPG\n";		break;	case BMP:		cout<<"图像格式为BMP\n";		break;	default:		cout<<"没有符合的图像格式，退出!\n";			}	return 0;}