生产随机银行卡号

void idbank()
{
char card[19] = {'6','2','2','7','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
int i;
int tmp = 0;
int tmp2;
char tmp3[1];

for (i = 6; i<19; i++)
{
itoa(rand()%10,tmp3,10);
card[i] = tmp3[0];

}

for(i = 17; i >= 0; i--)
{
if((i+1)%2 != 0)
{
tmp3[0] = card[i];
tmp2 = atoi(tmp3) * 2;
tmp = tmp + tmp2/10 + tmp2%10;
}
else
{
tmp3[0] = card[i];
tmp = tmp +atoi(tmp3);
}
}

if(tmp%10 == 0)
{
card[18] = '0';
}
else
{
tmp = 10 - tmp%10;
itoa(tmp,tmp3,10);
card[18] = tmp3[0];
}

lr_save_var(card,19,0,"bankID");
}


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