//查表,得到注册码
n=strlen(cSN1);
for (i=0;i<n;i++){
switch(cSN1[i]){
case '0':cSN1[i]='4';break;
case '1':cSN1[i]='0';break;
case '2':cSN1[i]='5';break;
case '3':cSN1[i]='9';break;
case '4':cSN1[i]='6';break;
case '5':cSN1[i]='1';break;
case '6':cSN1[i]='7';break;
case '7':cSN1[i]='3';break;
case '8':cSN1[i]='8';break;
case '9':cSN1[i]='2';break;
}
}