图片截取struct fileheader

{

char BM[2] //"BM"

unsigned long filesize

unsigned long reserved0

unsigned long BMPdataoffset

}fileheader,new_fileheader



struct infoheader

{

unsigned long BMPheadersize

unsigned long width

unsigned long height

unsigned short planes

unsigned short bitsperpixel

unsigned long compression

unsigned long BMPdatasize

unsigned long hRes

unsigned long vRes

unsigned long colors

unsigned long importantcolors 　　

}infoheader,new_infoheader