=====strspn=====
Syntax:

<code>
    #include <cstring>
    size_t strspn( const char *str1, const char *str2 );
</code>
The strspn() function returns the index of the first character in str1 that
doesn't match any character in str2.

Related Topics: [[strchr]], [[strpbrk]], [[strrchr]], [[strstr]], [[strtok]]