学步园

#include <iostream>
#include <string>
#include <cstdlib>
#include <fstream>
#include <iomanip>
using namespace std;

int main(int argc, char * argv[])
{


    char* pFilename="54.ppm";
	ifstream ifile;//input ppm file
	ofstream ofile;//output bmp file
	ifile.open(pFilename,ios::binary);
	if (!ifile) {
		cout<<"open error!"<<endl;
	}
	ofile.open("1.bmp",ios::binary);

	
	string FileType;//file type-p6
	int Width,Height,Count;//count is the number of pixels
	int DataSize,HeadSize,FileSize;
	ifile>>FileType>>Width>>Height>>Count;//get the para of the ppm file

	cout<<FileType<<"!"<<Width<<"!"<<Height<<endl;

	DataSize=Width*Height*3;//every pixel need 3 byte to store
	HeadSize=0x36;//54 Bype
	FileSize=HeadSize+DataSize;
	Count=Width*Height;

	cout<<Count<<endl;

	
	unsigned char BmpHead[54];

	for(int i=0;i<53;i++){
	    BmpHead[i]=0;
	}
    
	BmpHead[0]=0x42;
	BmpHead[1]=0x4D;//type
	cout<<FileSize<<endl;
	
	int SizeNum=2;//the size of bmp file
    while (FileSize!=0) {
		BmpHead[SizeNum++]=FileSize % 256; 
		FileSize = FileSize / 256;
    }

 	cout<<BmpHead[2]<<BmpHead[3]<<BmpHead[4]<<BmpHead[5]<<endl;
  
	BmpHead[0x0A]=0x36;//data begin here
	BmpHead[0x0E]=0x28;//size of bitmap information head
    
	int FileWidthCount = 0x12;//width 
	while (Width != 0)
	{

		BmpHead[FileWidthCount++] = Width % 256;
		Width = Width / 256;

	}
	int FileHeightCount = 0x16;//height
    while (Height != 0)
	{

		BmpHead[FileHeightCount++] = Height % 256;
		Height = Height / 256;
	}
    
	BmpHead[0x1A]=0x1;//device
	BmpHead[0x1C]=0x18;//every pixel need 3 byte

    
    int FileSizeCount=0x22;
	while (DataSize!=0) {
		BmpHead[FileSizeCount++]=DataSize%256;
		DataSize=DataSize/256;
	}

	int i,j;

	for (i=0; i<54; i++)
	{ofile << BmpHead[i];
	 cout<<BmpHead[i]<<endl;
	}

    char blue,green,red;

	ifile.ignore();
	cout<<"ok"<<endl;
	for(int j = Count;j >=1 ;j--){
		//cout<<"begin"<<endl;
		ifile.get(blue);
		ifile.get(green);
		ifile.get(red);

        ofile<<hex;
		ofile.put(red);
		ofile.put(green);
		ofile.put(blue);
		//cout<<j<<endl;
	}

	ifile.close();
	ofile.close();	
	return 0;
}