insert substring into string

[Magix]

how can I insert a substring into string ?E.g str_insert("WWW", MyStr, 3)
Can anyone provide the algorithm ?

Let say Mystr is "Testing"
the output will be TeWWWsting

void str_insert(const char *sourc,char *dest,int pos)
{
}

Thanks.

 

[Magix]

how can I insert a substring into string ?E.g str_insert("WWW", MyStr, 3)
Can anyone provide the algorithm ?

Let say Mystr is "Testing"
the output will be TeWWWsting

void str_insert(const char *sourc,char *dest,int pos)
{
}

Thanks.

I got the solution. Please ignore this post.