sprintf(len+id ?

Hi,

I'm trying to translate some C code to java and trying to understand some code so I could write it. Now I'm not a C expert, so don't laugh at me ;)

I'm trying to figure out what the line below does:

Code:

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sprintf(id + len,"%08x",(uint32_t)(timems & 0xffffffff));

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Where 'id' is u_char and 'len' is integer. Does he copy the resulting char array to id[len] or something ?

You basically got the idea.

id is the output string. It seems the author wanted that output to start at the 'len'th character in that array.

Yes, he wants to start at id[len], such as

'id' might be: "abcdefghijk\0"
And 'len' might be 4, so he wants to start at 'e'. Of course abcde... have been placed there as a visual aid.