string sourcefilename = "D:\\Logo.jpg";

    string destfilename="D:\\Logo1.jpg";

    FILE* fp;

    if ( (fp=fopen(sourcefilename.c_str(), "rb" ))==NULL )

    {

        return;

    }

    fseek(fp, 0, SEEK_END);

    int length=ftell(fp);

    rewind(fp);

    char* ImgBuffer=(char*)malloc( length* sizeof(char) );

    fread(ImgBuffer, length, 1, fp);

    fclose(fp);

    if ( (fp=fopen(destfilename.c_str(), "wb"))==NULL)

    {

         return;

    }

    fwrite(ImgBuffer,sizeof(char) *iSize, 1, fp);

    fclose(fp);

    free(ImgBuffer);

    #include<fstream>

    #include <iostream>

    string sourcefilename = "D:\\Logo.jpg";

    string destfilename="D:\\Logo1.jpg";

    std::ifstream fin(sourcefilename.c_str(), std::ios::binary);

    fin.seekg(0, ios::end);

    int iSize = fin.tellg();

    char* ImgBuffer = new char[ sizeof(char) *iSize];

    fin.seekg(0, ios::beg);

    fin.read(ImgBuffer, sizeof(char) * iSize);

    fin.close();

    std::ofstream outFile(destfilename.c_str(), ios::out | ios::binary);

    outFile.write(ImgBuffer,sizeof(char) * iSize);

    outFile.close();