sprintf(len+id ?

This is a discussion on sprintf(len+id ? within the C Programming forums, part of the General Programming Boards category; Hi, I'm trying to translate some C code to java and trying to understand some code so I could write ...

  1. #1
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    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:
    sprintf(id + len,"%08x",(uint32_t)(timems & 0xffffffff));
    Where 'id' is u_char and 'len' is integer. Does he copy the resulting char array to id[len] or something ?

  2. #2
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    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.

  3. #3
    Woof, woof! zacs7's Avatar
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    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.

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