strcpy - problem!!!

This is a discussion on strcpy - problem!!! within the C Programming forums, part of the General Programming Boards category; Hi, I tried looking for threads for strcpy specifically for my problem but i just can't find the specific answers. ...

  1. #1
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    Unhappy strcpy - problem!!!

    Hi,

    I tried looking for threads for strcpy specifically for my problem but i just can't find the specific answers. Anyway, here's my problem....

    I am trying to copy an array of string to my structure but i'm always getting an Unhandled Exception and points me to strcat.asm. Actually it is weird because in my program, it was not having the error not until i changed the value i passed. I tried several approach to test and debug why it is happening but it just keeps on giving the error.

    Below is a snippet of my code for your reference. I'm trying to copy a string to two differently declared structures. I hope someone could help me... ASAP!

    Code:
    typedef struct st_personal_info
    {
    	char	sName[51];
    	int	iAge;
    	char sAddress[501];
    	char	sBirthday[11];
    }ST_PERSONAL_INFO;
    
    typdef struct st_field_values
    {
    	char sField[6];
    	char sValue[51];
    } ST_FIELD_VALUES;
    
    ...
    
    int main()
    {
    	ST_PERSONAL_INFO *lst_personalInfo;
    	ST_FIELD_VALUES lst_fieldValues;
    	char lsToPass[11] = "MICHAEL";
    
    	strcpy(lst_fieldValues.sValue, lsToPass);
    	strcpy(lst_personalInfo->sName, lst_fieldValues.sValue);
    ...
    
    }
    I am having the exception at "strcpy(lst_personalInfo->sName, lst_fieldValues.sValue);" and I don't know why. Please help.

    Many thanks everyone!

  2. #2
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    You need to allocate memory for the record pointer.

    ST_PERSONAL_INFO *lst_personalInfo = malloc(sizeof(ST_PERSONAL_INFO));

    Don't forget to free it when you're done.

  3. #3
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    Im familiar with the "new" call for C++ so seeing the C version is new for me.

    Is there any difference between malloc and new?

    edit: oops! didnt notice the C board
    Last edited by JohnLeeroy; 01-15-2011 at 08:55 PM.

  4. #4
    a_capitalist_story
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    JohnLeeroy, new() is strictly a C++ function. This is the C forum, it's safe to assume that using C's malloc is required.

    Oh, and cross-posted.

  5. #5
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    Quote Originally Posted by JohnLeeroy View Post
    Im familiar with the "new" call for C++ so seeing the C version is new for me.

    Is there any difference between malloc and new?

    edit: oops! didnt notice the C board
    Well, at some point new probably calls malloc() but it also includes logic to activate constructors in classes.

    Malloc just gives you a blob of memory to work with.

  6. #6
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    Talking

    Quote Originally Posted by CommonTater View Post
    You need to allocate memory for the record pointer.

    ST_PERSONAL_INFO *lst_personalInfo = malloc(sizeof(ST_PERSONAL_INFO));

    Don't forget to free it when you're done.
    I tried your solution. Well... it worked! thanks a lot! really appreciate it!

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