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copied!<p>The solution is strtok() in string.h.</p> <p>Here's a good example of how to use.</p> <pre><code>/* strtok example by mind@metalshell.com * * This is an example on string tokenizing * * 02/19/2002 * * http://www.metalshell.com * */ #include <stdio.h> #include <string.h> int main(int argc, char *argv[]) { int x = 1; char str[]="this:is:a:test:of:string:tokenizing"; char *str1; /* print what we have so far */ printf("String: %s\n", str); /* extract first string from string sequence */ str1 = strtok(str, ":"); /* print first string after tokenized */ printf("%i: %s\n", x, str1); /* loop until finishied */ while (1) { /* extract string from string sequence */ str1 = strtok(NULL, ":"); /* check if there is nothing else to extract */ if (str1 == NULL) { printf("Tokenizing complete\n"); exit(0); } /* print string after tokenized */ printf("%i: %s\n", x, str1); x++; } return 0; } </code></pre> <p>The thing that confuses people about strtok is the first time you call the method the first argument you pass in a pointer to the string you want to tokenize and on subsequent calls you pass NULL. strtok uses a static variable in it's implementation to keep track of where it should start start searching from in subsequent calls. </p> <ul> <li>Passing NULL you're telling strtok to continue searching from where we left off last time.</li> <li>Passing in a pointer != NULL you're telling the tokenizer that you are starting at the beginning of a new string so disregard previous state information.</li> </ul>

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