條形碼（barcode）code128生成代碼 很簡單 多些這位兄弟https://bbs.csdn.net/topics/350125614

下面是我的DEMO 直接放到VS2005下面編譯即可

#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("038000356216",code);
    printf("cod:\n%s\n",code.c_str());
    CImage img;
    GetImg(code,img);
    img.Save(L
 
"d:/barcode-demo.jpg");//這裏基本就OK了 下面是直接顯示到屏幕的代碼

    CImage demo;
    {
        demo.Create(img.GetWidth()+400,img.GetHeight()+400,24);
        HBRUSH white=(HBRUSH)GetStockObject(WHITE_BRUSH);
        RECT rc;
        rc.left=0;
        rc.right=demo.GetWidth();;
        rc.top=0;
        rc.bottom=demo.GetHeight();
        HDC hdc
 
=demo.GetDC();
        ::FillRect(hdc,&rc,white);
        img.BitBlt(hdc,200,200);
        demo.ReleaseDC();
    }

    while(1)
    {
        demo.BitBlt(Hdc,100,100);
        ::Sleep(50);
    }
    return 0;
}

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

    int perWid=1;
    int externWid=0;
    int hei=76+externWid*2;
    int wid=code.length()*perWid+externWid*2;
    img.Create(wid,hei,24);
    HDC hdc=img.GetDC();
    HBRUSH white=(HBRUSH)GetStockObject(WHITE_BRUSH);
    HBRUSH black=(HBRUSH)GetStockObject(BLACK_BRUSH);
    RECT rc;
    rc.left=rc.top=0;
    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=0;i<code.length();++i)
    {
        ::FillRect(hdc,&rc,p[i]==‘0‘?white:black);
        rc.left+=perWid;
        rc.right+=perWid;
    }
    img.ReleaseDC();
}
bool FillCodeMap(void)//g_codemap是個map，這我不用講了，找個地方定義一下，在此處填充
{
if(!g_codemap.empty())
return true;

g_codemap[32]="11011001100";
g_codemap[33]="11001101100";
g_codemap[34]="11001100110";
g_codemap[35]="10010011000";
g_codemap[36]="10010001100";
g_codemap[37]="10001001100";
g_codemap[38]="10011001000";
g_codemap[39]="10011000100";
g_codemap[40]="10001100100";
g_codemap[41]="11001001000";
g_codemap[42]="11001000100";
g_codemap[43]="11000100100";
g_codemap[44]="10110011100";
g_codemap[45]="10011011100";
g_codemap[46]="10011001110";
g_codemap[47]="10111001100";
g_codemap[48]="10011101100";
g_codemap[49]="10011100110";
g_codemap[50]="11001110010";
g_codemap[51]="11001011100";
g_codemap[52]="11001001110";
g_codemap[53]="11011100100";
g_codemap[54]="11001110100";
g_codemap[55]="11101101110";
g_codemap[56]="11101001100";
g_codemap[57]="11100101100";
g_codemap[58]="11100100110";
g_codemap[59]="11101100100";
g_codemap[60]="11100110100";
g_codemap[61]="11100110010";
g_codemap[62]="11011011000";
g_codemap[63]="11011000110";
g_codemap[64]="11000110110";
g_codemap[65]="10100011000";
g_codemap[66]="10001011000";
g_codemap[67]="10001000110";
g_codemap[68]="10110001000";
g_codemap[69]="10001101000";
g_codemap[70]="10001100010";
g_codemap[71]="11010001000";
g_codemap[72]="11000101000";
g_codemap[73]="11000100010";
g_codemap[74]="10110111000";
g_codemap[75]="10110001110";
g_codemap[76]="10001101110";
g_codemap[77]="10111011000";
g_codemap[78]="10111000110";
g_codemap[79]="10001110110";
g_codemap[80]="11101110110";
g_codemap[81]="11010001110";
g_codemap[82]="11000101110";
g_codemap[83]="11011101000";
g_codemap[84]="11011100010";
g_codemap[85]="11011101110";
g_codemap[86]="11101011000";
g_codemap[87]="11101000110";
g_codemap[88]="11100010110";
g_codemap[89]="11101101000";
g_codemap[90]="11101100010";
g_codemap[91]="11100011010";
g_codemap[92]="11101111010";
g_codemap[93]="11001000010";
g_codemap[94]="11110001010";
g_codemap[95]="10100110000";
g_codemap[96]="10100001100";
g_codemap[97]="10010110000";
g_codemap[98]="10010000110";
g_codemap[99]="10000101100";
g_codemap[100]="10000100110";
g_codemap[101]="10110010000";
g_codemap[102]="10110000100";
g_codemap[103]="10011010000";
g_codemap[104]="10011000010";
g_codemap[105]="10000110100";
g_codemap[106]="10000110010";
g_codemap[107]="11000010010";
g_codemap[108]="11001010000";
g_codemap[109]="11110111010";
g_codemap[110]="11000010100";
g_codemap[111]="10001111010";
g_codemap[112]="10100111100";
g_codemap[113]="10010111100";
g_codemap[114]="10010011110";
g_codemap[115]="10111100100";
g_codemap[116]="10011110100";
g_codemap[117]="10011110010";
g_codemap[118]="11110100100";
g_codemap[119]="11110010100";
g_codemap[120]="11110010010";
g_codemap[121]="11011011110";
g_codemap[122]="11011110110";
g_codemap[123]="11110110110";
g_codemap[124]="10101111000";
g_codemap[125]="10100011110";
g_codemap[126]="10001011110";
g_codemap[195]="10111101000";
g_codemap[196]="10111100010";
g_codemap[197]="11110101000";
g_codemap[198]="11110100010";
g_codemap[199]="10111011110";
g_codemap[200]="10111101110";
g_codemap[201]="11101011110";
g_codemap[202]="11110101110";
g_codemap[203]="11010000100";
g_codemap[204]="11010010000";
g_codemap[205]="11010011100";
g_codemap[206]="1100011101011";
g_codemap[207]="11011001100";

return true;
}
bool GetStringCode(char *str, string &strCode)
{//傳說中的code128B碼就是這麽造的，因為VC中的char其實就是一個int，所以對我們VC來講更是簡單無比
if(str==NULL)
return false;
if(int(strlen(str))==0)
return false;

vector <int> tV;

int nTol = 104;
int nsz = strlen(str);

for (int i=0;i<nsz;i++)
{
if(str[i]>=32)
nTol += (str[i] - 32) * (i+1);
else
nTol += (str[i] + 64) * (i+1);
}

int nEndCode = nTol%103;
if (nEndCode>=95)
{
if(nEndCode<=102)
nEndCode = 100 + nEndCode;
}
else
{
nEndCode += 32;
}

tV.push_back(204);//加頭
for (int j=0;j<nsz;j++)
tV.push_back(int(str[j]));//加內容
tV.push_back(nEndCode);//加校驗碼
tV.push_back(206);//加尾

int nV = tV.size();
for (int k=0;k<nV;k++)
{
strCode += g_codemap[tV.at(k)];
}


return true;
}

條形碼（barcode）code128生成代碼