giving value to structure elements

This is a discussion on giving value to structure elements within the C Programming forums, part of the General Programming Boards category; if i am having a following structure Code: struct emp { int acc; char name; }; struct emp e; if ...

  1. #1
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    giving value to structure elements

    if i am having a following structure

    Code:
    struct emp
    {
         int acc;
         char name;
    };
    struct emp e;
    if i am giving value as

    Code:
    e.acc|=ACC_NO;
    what the above statement mean. can anyone explain me...

    thanks in advance...

  2. #2
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    Quote Originally Posted by sarathius View Post
    if i am having a following structure

    Code:
    struct emp    //a struct is defined
    {
         int acc;     //with these parts
         char name;     
    };
    struct emp e;  //a struct of type emp is created, and named e
    if i am giving value as

    Code:
    e.acc|=ACC_NO;   //mistype, correct is e.acc = variable, not e.acc |= variable
    what the above statement mean. can anyone explain me...
    The last line of code shows the dot operator, which is used to access the parts of the struct. Note that "char name" is not an array of char's, but only a single char. To make it longer, you need to make it a char array - char name[40], for example.

    Remember that a bunch of char's is not a string, in C. No matter how many there are of them. They are elevated to a string ONLY when they have an End of String marker char, placed as their last value: '\0'.

    So: "Frederick" is not a string, but "Frederick\0" is one.

  3. #3
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    ya, you are right. But, i need help for the second statement in assigning values for structure elements. what's that "or(|)" symbol comes here.

  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    It's used to set specific bits in a variable. Typically used to combine several flags into one variable.
    One flag sets bit 1, the next bit 2, and so on.

    See it as
    SetBit(e.acc, ACC_NO);
    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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