条形码（barcode）code128生成代码

条形码（barcode）code128生成代码 很简单 多些这位兄弟https://bbs.****.net/topics/350125614

下面是我的DEMO 直接放到VS2005下面编译即可

#include <ctime>
#include <string>
#include <map>
#include <vector>
using namespace std;
#include <windows.h>
#include <atlimage.h>
map<int,string> g_codemap;
bool FillCodeMap(void);
bool GetStringCode(char *str, string &strCode);
bool GetImg(string code,CImage& img);
HDC Hdc=::GetWindowDC(::GetDesktopWindow());
int main(int argc, char **argv)
{
    //"038000356216"
    FillCodeMap();
    string code;
    GetStringCode("",code);
    printf("cod:\n%s\n",code.c_str());
    CImage img;
    GetImg(code,img);
    img.Save(L"d:/barcode-demo.jpg");//这里基本就OK了 下面是直接显示到屏幕的代码

    CImage demo;
    {
        demo.Create(img.GetWidth()+,img.GetHeight()+,);
        HBRUSH white=(HBRUSH)GetStockObject(WHITE_BRUSH);
        RECT rc;
        rc.left=;
        rc.right=demo.GetWidth();;
        rc.top=;
        rc.bottom=demo.GetHeight();
        HDC hdc=demo.GetDC();
        ::FillRect(hdc,&rc,white);
        img.BitBlt(hdc,,);
        demo.ReleaseDC();
    }

    while()
    {
        demo.BitBlt(Hdc,,);
        ::Sleep();
    }
    return ;
}

bool GetImg(string code,CImage& img)
{
    if(code.empty())return false;
    if(!img.IsNull())img.Destroy();

    int perWid=;
    int externWid=;
    int hei=+externWid*;
    int wid=code.length()*perWid+externWid*;
    img.Create(wid,hei,);
    HDC hdc=img.GetDC();
    HBRUSH white=(HBRUSH)GetStockObject(WHITE_BRUSH);
    HBRUSH black=(HBRUSH)GetStockObject(BLACK_BRUSH);
    RECT rc;
    rc.left=rc.top=;
    rc.right=img.GetWidth();
    rc.bottom=img.GetHeight();
    ::FillRect(hdc,&rc,white);

    rc.left=externWid;
    rc.right=rc.left+perWid;
    rc.top=externWid;
    rc.bottom=img.GetHeight()-externWid;
    const char* p=code.c_str();
    for(int i=;i<code.length();++i)
    {
        ::FillRect(hdc,&rc,p[i]==''?white:black);
        rc.left+=perWid;
        rc.right+=perWid;
    }
    img.ReleaseDC();
}
bool FillCodeMap(void)//g_codemap是个map，这我不用讲了，找个地方定义一下，在此处填充
{
if(!g_codemap.empty())
return true;

g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
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g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
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g_codemap[]="";
g_codemap[]="";
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g_codemap[]="";
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g_codemap[]="";
g_codemap[]="";
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g_codemap[]="";
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g_codemap[]="";
g_codemap[]="";
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g_codemap[]="";
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g_codemap[]="";
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g_codemap[]="";
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g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";
g_codemap[]="";

return true;
}
bool GetStringCode(char *str, string &strCode)
{//传说中的code128B码就是这么造的，因为VC中的char其实就是一个int，所以对我们VC来讲更是简单无比
if(str==NULL)
return false;
if(int(strlen(str))==)
return false;

vector <int> tV;

int nTol = ;
int nsz = strlen(str);

for (int i=;i<nsz;i++)
{
if(str[i]>=)
nTol += (str[i] - ) * (i+);
else
nTol += (str[i] + ) * (i+);
}

int nEndCode = nTol%;
if (nEndCode>=)
{
if(nEndCode<=)
nEndCode =  + nEndCode;
}
else
{
nEndCode += ;
}

tV.push_back();//加头
for (int j=;j<nsz;j++)
tV.push_back(int(str[j]));//加内容
tV.push_back(nEndCode);//加校验码
tV.push_back();//加尾

int nV = tV.size();
for (int k=;k<nV;k++)
{
strCode += g_codemap[tV.at(k)];
}

return true;
}