=====strcspn=====
Syntax:

<code>
    #include <cstring>
    size_t strcspn( const char *str1, const char *str2 );
</code>
The function strcspn() returns the index of the first character in str1 that
matches any of the characters in str2.

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