scanf a big hexadecimal value

问题

I have a issue trying to use scanf to get a big hexadecimal num (12 chars) from the user.

it seems to only get the last 8 chars, eg - ABFFFFFFFF will become 0000FFFFFFFF.

this is my code -

unsigned long long address;
scanf("%x",&address);
printf("Address: %#014x", address);

for this input: "ABFFFFFFFF" the output would be:

Address: 0x0000ffffffff

i have tried playing a bit with the scanf format, but to no avail.

回答1:

You must use "%llx" for both scanf format and printf. See the manual page for additional details.

来源：https://stackoverflow.com/questions/30561882/scanf-a-big-hexadecimal-value