Thread: How I can search a string and identify where words begin and end?

for example: want to search "how" from the string "Hello how are you?"
However, I want the index number in the array from where the find starts i.e 7 as "how" starts from 7 position
in "Hello how are you?" string.

Originally Posted by alone2002dj

for example: want to search "how" from the string "Hello how are you?"
However, I want the index number in the array from where the find starts i.e 7 as "how" starts from 7 position
in "Hello how are you?" string.

To split up strings and find a certain word out of them use strtok.

Not sure about finding position.

Code:

newstring = strtok(oldstring," ");
        while(newstring != NULL)
        {
            printf("%s ",t);
            
            // Get the next token on the line
            newstring = strtok(oldstring," ");
        }

you could use strstr() to get a pointer to the first element in the target string, and from that pointer loop until you encounter a whitespace character or null terminator. for example:

Code:

char *str = "Hello how are you?", *p;

for(p = strstr(str, "how"); *p && *p != ' '; p++) {
   /* we're in the string "how", do something with p */
}

Originally Posted by vart

and what is the t in the sample?
the subsequent calls to strtok should be made with NULL as a first parameter

t should have been the newstring. I edited the names to make it easier to read and missed that one.