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Type: Posts; User: Jasper

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  1. Replies
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    1,206

    Pointer question

    Sounds simple... but why isn't bookPtr = &theBook the same as
    *bookPtr =theBook?
  2. Thread: Basic pointer q

    by Jasper
    Replies
    1
    Views
    1,175

    Basic pointer q

    Hmm...Can I replace *area= A * B with area = &(A * B)?




    void rectangleMath(double *area, double *perim, double A, double B)
    {
    *area = A * B;
    *perim = (A + B) * 2;
    }
  3. Thread: function call

    by Jasper
    Replies
    2
    Views
    911

    function call

    This may sound like a simple question,but can u explain why we have to put
    newOne=newPlanet(); ? Would it be ok if I just put newPlanet(); there?



    void enterPlanets(List *list)
    {
    Planet...
  4. Thread: List

    by Jasper
    Replies
    2
    Views
    793

    List

    Why can't I add anything to either keylist or locklist?Here's my code,




    #include <stdio.h>
    #include <malloc.h>
    #include <string.h>
    #include "key.h"
    #include "lock.h"
  5. Replies
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    Elysia, u mean Im supposed to allocate memory for...

    Elysia, u mean Im supposed to allocate memory for code? If that is so,is the code below the way to do it?


    keyCode = (char *) malloc(code * sizeof(char);
  6. Replies
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    So.... should I change strcpy(ky->code ,...

    So.... should I change strcpy(ky->code , keyCode); to ky->code = keyCode; ? Ive tried it but it still gives the same exact error. Thkx
  7. Replies
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    This has to do with modular decomposition. The...

    This has to do with modular decomposition. The code I gave was in the c file. This one below is in the h.file.



    typedef struct
    {
    int id;
    char code;
    }Key;
  8. Replies
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    Nope, I've double checked. I do have #include...

    Nope, I've double checked. I do have #include <string.h> .What's the problem then?Thkc
  9. Replies
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    Assigning something

    Im trying to initialize code with keyCode and id with keyId respectively. Why do I get ['strcpy' makes integer from pointer without cast]?




    Key * ky_new(const char * keyCode, int keyId)
    {
    ...
  10. Thread: lc_toggle

    by Jasper
    Replies
    4
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    819

    lc_toggle

    Can someone explain this to me with an example. Thkx very much :)

    lc_toggle - This function accepts a struct lock * for the lock record and inverse the
    value of isLocked (from...
  11. Thread: C-char* string

    by Jasper
    Replies
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    1,035

    C-char* string

    whats the prefix C in C-char* string suppose to mean? is it to show that char is a constant?
  12. Thread: Pointer Problem

    by Jasper
    Replies
    2
    Views
    1,065

    Pointer Problem

    Why is there no asterisk before lowest n highest in printf of main?


    main()
    {
    ...
    printf("The average monthly rainfall in Melbourne is %.2fmm,\n" , total / 12);
    printf("The lowest rainfall of...
  13. Replies
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    But how do I change it to uppercase while...

    But how do I change it to uppercase while retaining my constant?
  14. Replies
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    why do I get this statement?

    assignment of read only location



    ...

    int yes(const char * question)
    {
    do
    {
  15. Replies
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    struct in function call

    any idea why i get 0.0000 printed out for slength instead of my wanted value?


    ...
    int main(void)
    {
    struct Segment seg;
    double seglength();
    double slength;
  16. Thread: rain

    by Jasper
    Replies
    3
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    1,228

    num sum

    Thkx. now its better. but why the num is not sum of my array elements? error wif my function?
  17. Thread: rain

    by Jasper
    Replies
    3
    Views
    1,228

    rain

    noob here.Why is it I get big number for the three %2.1fmm instead of my expected 51.4mm etc..?



    double rainTotal(double rainfall[12])
    {
    int i;
    double total = rainfall[0];
    ...
  18. Replies
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    2D array of names

    Why is it that I do not get the date printed ?


    int main()
    {
    ...

    char month[][MONTHS] = {"Jan", "Feb" , "Mar" , "Apr" , "May" , "Jun" , "Jul" , "Aug" , "Sep" , "Oct" , "Nov" , "Dec"};

    ...
  19. Replies
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    incremental development approach

    What is the advantages of incremental development approach?
  20. Replies
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    thkx 4 ur help Elysia

    thkx 4 ur help Elysia
  21. Replies
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    !value required as left operand of assignment

    Its the problem with my loop part. How do I fix this?


    #include <stdio.h>

    /* Define constant NUM_FIBON (number of fibonacci numbers) to be, say, 12 */
    #define NUM_FIBON 12
    int main()
    {
    ...
  22. Thread: Library

    by Jasper
    Replies
    1
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    1,074

    Library

    Is there any differences between #include <cstdlib> and #include <stdlib.h> ?
  23. Replies
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    Command line arguments

    </code>
    int main(int argc, char * argv[])
    </code>

    Can someone tell me why there is the need of asterick for char *argv[]. Does this make argv[] a pointer?
  24. Replies
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    Array of pointers

    A bit stuck here. Why is it that " One thing that arrays don't require that other variables do, is a reference operator when you want to have a pointer to the string."
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    C and C++ pointers

    Is there any difference btwn C and C++ pointers?Can someone explain to me the use of new and delete operators in C++?Thkx.
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