very basic question about char *

[itsthemac]

I'm new to c and need to take in a string (char *) and cut it down into its individual words. I'm not sure what the most efficient way to do this would be. For example if given the string "This is a string", I need to turn it into the four strings "This", "is", "a", and "string". There will only be a maximum of 4 words in the input string, so I'm trying to figure out what the best strategy would be. Thanks for any help.

I'm also kind of confused about how a char * can point to a string. Why isn't it just a pointer to one character? Thanks.

[ssharish2005]

The process of dividing string to its works is called tokenisation. Have a look the function strtok on how tokenise the string given the de-eliminator character. For example:

char str[] = "This is a test";
chatr *p = strtok( str, ' ');
printf(p);

But its more than that if you had to tokenise the whole string. Have a google or search the forum. You will find dozens of post related this topic.

ssharish

[itsthemac]

The process of dividing string to its works is called tokenisation. Have a look the function strtok on how tokenise the string given the de-eliminator character. For example:

char str[] = "This is a test";
chatr *p = strtok( str, ' ');
printf(p);

But its more than that if you had to tokenise the whole string. Have a google or search the forum. You will find dozens of post related this topic.

ssharish

Ok, cool thanks. Just as an aside, is there any difference between saying

char str[] = "String";

and

char * str = "String";

?

[Bayint Naung]

Question 6.2

[itsthemac]

Question 6.2

thank you very much!

[ssharish2005]

Ok, cool thanks. Just as an aside, is there any difference between saying

Code:
char str[] = "String";
and 

Code:
char * str = "String";
?

Yes there is a different, the former is a string which can be changes. So basically you're initialising the char array str[] to literal string. But with the later you're literal string is stored in readonly memory and pointer *str is pointing to that memory location. This basically means that you cannt later the string. But with the former method you can alter the string if needed later in the code.

ssharish