int main(int argc,char** argv)
{
int n;
while(scanf("%d",&n)!=EOF)
{
printf("%d\n",dec2oct(n));
}
return 0;
}
int main_2 (int argc, const char * argv[]) {
int decimal = 12785;
dec2bin(decimal);
dec2oct(decimal);
dec2hexa(decimal);
return 0;
}
void itob(int n, char s[], int b)
{
switch (b) {
case 2:
dec2bin(n,s);
printf("%s\n",s);
break;
case 8:
dec2oct(n,s);
reverse(s);
printf("%s\n",s);
break;
case 10:
printf("%d\n",n);
break;
case 16:
dec2hex(n,s);
reverse(s);
printf("%s\n",s);
break;
default:
break;
}
}
int dec2oct(int dec){
int ret = 0;
if(dec != 0)
ret = dec2oct(dec/8);
return ret*10 + dec%8;
}
void calculate_checksum(FILE_HEADER* header) {
int sum = 0;
char buffer[8];
int unit[15] = {
NAME_S, MODE_S, UID_S, GID_S, SIZE_S, MTIME_S, TYPEFLAG_S, LINKNAME_S,
MAGIC_S, VERSION_S, UNAME_S, GNAME_S, DEVMAJOR_S, DEVMINOR_S, PREFIX_S
};
int i;
int j = -1;
loop:
i = 0;
j++;
while(i < unit[j]) {
switch(j) {
case 0:
sum += (int)header->name[i++];
break;
case 1:
sum += (int)header->mode[i++];
break;
case 2:
sum += (int)header->uid[i++];
break;
case 3:
sum += (int)header->gid[i++];
break;
case 4:
sum += (int)header->size[i++];
break;
case 5:
sum += (int)header->mtime[i++];
break;
case 6:
sum += (int)header->typeflag[i++];
break;
case 7:
sum += (int)header->linkname[i++];
break;
case 8:
sum += (int)header->magic[i++];
break;
case 9:
sum += (int)header->version[i++];
break;
case 10:
sum += (int)header->uname[i++];
break;
case 11:
sum += (int)header->gname[i++];
break;
case 12:
sum += (int)header->devmajor[i++];
break;
case 13:
sum += (int)header->devminor[i++];
break;
case 14:
sum += (int)header->prefix[i++];
break;
}
}
if(j != 14)
goto loop;
sprintf(buffer, "%d", sum);
sprintf(buffer, "%lld", dec2oct(buffer));
header->cksum[0] = '0';
header->cksum[1] = buffer[0];
header->cksum[2] = buffer[1];
header->cksum[3] = buffer[2];
header->cksum[4] = buffer[3];
header->cksum[5] = buffer[4];
header->cksum[6] = '\0';
header->cksum[7] = ' ';
}
