Newb help: Traversing a char *data

[joppe]

Hi!

This is probably a stupid question, but I've searched and tried to find the answear for 4 hours now and im getting a little tired.

Okay here it goes.
I got a list containing a char *data and want to replace every 'a, e' from the data string. Traversing the list and printing out every "line" of data isnt any problem, the problem is when I try to get data[i], or copying the string "head->data" to a sbuffer[maxchars].
Is there any easy way of doing this without changing my "char *data" into a "char data[maxchars]"?

void rplce(lnode *head){
    char *ans;
    char cbuffer[50];
    int maks = 50;
 
 
    while(head){
 
                                /*none of em works*/
        /*strcat(cbuffer, head->data)*/
        /*char datacpy[50] = head->data;*/
 
        /*while(ans = strpbrk(head->data, 'aeiouy'){
 
        }*/
 
 
        head = head->next;
    }
}
 
was thinking about doing something like this.
 
while(head){
 
       while(char *ans = strbrk(head->data, 'ae'){
 
       ans = 'i';
 
       /*switching every occurrence of ae in the strings to i*/
 
       }
 
 
head = head->next;
}

Thanks in advance
Joppe

[weaknessforcats]

/*strcat(cbuffer, head->data)*/
/*char datacpy[50] = head->data;*/

/*while(ans = strpbrk(head->data, 'aeiouy'){

}*/

/*strcat(cbuffer, head->data)*/ won't work unless there is a null terminator in cbuffer (which you never initialized)


/*char datacpy[50] = head->data;*/ won't work because the initial value must be a literal string. This shouldn't even compile.


/*while(ans = strpbrk(head->data, 'aeiouy'){ won't work because 'aeiouy' is not a string (it's not a character either). You need a string "aeiouy".
Then strpbrk will return a pointer to the first occurrence of any of these characters.

[joppe]

Thanks for the reply.

Okay let us say that I use while(char *ans = strbrk(head->data, "ae").
It wont compile.
The reason beeing head->data I think.

Compile error:
test.c:108: error: syntax error before "char"
test.c: At top level:
test.c:120: error: syntax error before '}' token

All i want to is to extract the data string from head->data modify it and update it.. If I had used a "char data[X]" instead of "char *data" in my node it would work. But I want to try this with the "char *data".
If I just manage to convert this data into a char[x] I dont even need to use a strbrk, il just use a switch.

But again, everything I try fails.
Any more suggestions?

TIA
Joppe

[weaknessforcats]

while(char *ans = strbrk(head->data, "ae").

It compiles for me using Visual Studio.NET 2005 priovided head->data is a char*

I suspect another error base on:

test.c:108: error: syntax error before "char"

That is, when your compiler encountered char, it knew it was in trouble. Look upwards from the while statement to see if thgere is something else wrong.