Unsigned Short to Char[X]

This is a discussion on Unsigned Short to Char[X] within the C++ Programming forums, part of the General Programming Boards category; I need to take a value out of an unsigned short and add it to a char array. ex.: unsigned ...

  1. #1
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    Unsigned Short to Char[X]

    I need to take a value out of an unsigned short and add it to a char array.

    ex.:

    unsigned short a = 6849;
    char b[20];

    any idea about how to place "6849" into b ?

    Thank you !

  2. #2
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    your task doesn't really make sense. do you have a more complete explanation of what you are required to do?

    xxxxxxxxxan unsigned short is 2 bytes. you can do shifts and masks to get the LSB and MSB and put them in b[0] and b[1] if thats what you want.

    never mind. you probably want to turn 6849 into a printable string?

    one way is
    Code:
    count = snprintf(b,sizeof(b),"%u",a);
    Last edited by dmh2000; 03-28-2011 at 12:23 PM.

  3. #3
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    I'm totally lost

    I'm sending a char[] through a socket and I want to send some numeric information.

    I guess you mean using those operators >> << ...

    I will go read about this !

    Thank you

  4. #4
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    i was thinking too much. if you want to use iostreams, then using << is the way to go. but do you want to send it as binary data or as ascii string?
    Last edited by dmh2000; 03-28-2011 at 12:26 PM.

  5. #5
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    Hummmm

    I don't know much about hidden functionnality behing sockets but I already send some text ("ABCDE") through a char and i can get it back on the other side ("ABCDE") .

    i guess it's called ascii string ?

    is count supposed to be a char[] ?

  6. #6
    C++まいる!Cをこわせ!
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    I suggest you use stringstreams to convert data to a string before sending it:
    Code:
    std::stringstream stream;
    stream << my_integer;
    std::string mydata = stream.str();
    Now you can send the raw string by using the c_str() member function to get the string and size() to get the length.

    To extract the data on the other end, you can do:
    Code:
    std::stringstream stream(received_data);
    stream >> my_data;
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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