A pointer to a member of an array of structures

This is a discussion on A pointer to a member of an array of structures within the C Programming forums, part of the General Programming Boards category; Code: int main(void) { struct circle circle[MAXCIRCLES] getCircle(&circle[1]); } void getCircle(struct circle *circ) { printf("Centre: "); scanf("%f, %f", &(*circ).centre.x, &(*circ).centre.y); ...

  1. #1
    Registered User
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    A pointer to a member of an array of structures

    Code:
    int main(void)
    {
       struct circle circle[MAXCIRCLES]
       getCircle(&circle[1]);
    }
    
    void getCircle(struct circle *circ)
    {
       printf("Centre: ");
       scanf("%f, %f", &(*circ).centre.x, &(*circ).centre.y);
       printf("Radius: ");
       scanf("%f", &(*circ).radius);
    }
    I want to pass the circle[1] by reference to the getCircle function. My code works, but the part where i put &(*circ).centre.x etc seems a little weird. Is there a better way of doing it?

  2. #2
    Registered User Vber's Avatar
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    Nov 2002
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    807
    you can use the '->' operator if you think it's "better"

  3. #3
    Registered User
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    I find this weird: &(*circ).radius

    Because isn't it saying the address of the value pointed to by the circ pointer? Shouldn't circ return the same thing?

  4. #4
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Posts
    14,826
    Originally posted by ChwanRen
    I find this weird: &(*circ).radius

    Because isn't it saying the address of the value pointed to by the circ pointer? Shouldn't circ return the same thing?
    It says:

    1) Dereference 'circ', and give me that object.
    2) Now that I have that object, find the radius member of it.
    3) Now give me the address of that member.

    Quzah.
    Hope is the first step on the road to disappointment.

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