for(k=0;k<n/iChNum/4;k++)
             {
               b=0;
               for(j=0;j<18;j=j+2)
                 {
                    for(i=0;i<2;i++)
                     {
                       fbuf[i]=cRBuf[(k*iChNum+j)*2+i];
                     }
                    tempd=(fbuf[1] & 0x0f )*256+fbuf[0];
                    x=((tempd-2048)/409.6-ZeroPoint[ADDR][b])/Sensitivity[ADDR][b];
                    tempss=FloatToStr(x);
                    tempss=tempss.SubString(0,6);
                    if ((x<0.0001) && (x>-0.0001))
                     tempss="0.0   ";
                    for(i=tempss.Length();i<=6;i++)
                     {
                       tempss=tempss+" ";
                     }
                    temps="";
                    temps+=tempss+"  ";
                    for(i=2;i<4;i++)
                     {
                       fbuf[i]=cRBuf[(k*iChNum+j)*2+i];
                     }
                    tempd=(fbuf[3] & 0x0f )*256+fbuf[2];
                    x=((tempd-2048)/409.6-ZeroPoint[ADDR][b])/Sensitivity[ADDR][b];
                    tempss=FloatToStr(x);
                    tempss=tempss.SubString(0,6);
                    if ((x<0.0001) && (x>-0.0001))
                    tempss="0.0   ";
                    for(i=tempss.Length();i<=6;i++)
                     {
                       tempss=tempss+" ";
                     }
                    temps+=tempss+"  ";
                    date=datafilename.SubString(18,10);
                    if (DirectoryExists("D:\\Gzhou_data\\"+date) ==0)
                     {
                       MkDir("D:\\Gzhou_data\\"+date);
                     }
                    s="D:\\Gzhou_data\\"+ date + "\\" +cjnumb+"_"+FloatToStr(b)+".dat";
                    fp = fopen(s.c_str(),"a+");
                    fprintf(fp,"%s\n",temps);
                    fclose(fp);
                    b=b+1;
                 }
               for(a=0;a<2;a++)
                 {
                    for(i=0;i<2;i++)
                     {
                      fbuf[i]=cRBuf[(k*iChNum+j)*2+i];
                     }
                    tempd=(fbuf[1] & 0x0f )*256+fbuf[0];
                    x=((tempd-2048)/409.6-ZeroPoint[ADDR][b])/Sensitivity[ADDR][b];
                    tempss=FloatToStr(x);
                    tempss=tempss.SubString(0,6);
                    if ((x<0.0001) && (x>-0.0001))
                        tempss="0.0   ";
                    for(i=tempss.Length();i<=6;i++)
                     {
                      tempss=tempss+" ";
                     }
                    temps="";
                    temps+=tempss+"  ";
                    s="D:\\Gzhou_data\\"+ date + "\\" +cjnumb+"_"+FloatToStr(j)+".dat";
                    fp = fopen(s.c_str(),"a+");
                    fprintf(fp,"%s\n",temps);
                    fclose(fp);
                    j=j+1;
                    b=b+1;
                 }
            }
就是想向D盘的一个目录下写数据，可是关于j 的循环好像出不来，我观察b只是到8，不会再增加了，请高手指点。