Insert a string into another string efficiently

Question

I have

char aa[] = { \"Hello, !\" };

char bb[] = { \"World\" };

How to insert bb into aa the most efficiently with cstring

Answer 1

• allocate big enough buffer (malloc/new[])
• copy the first part of the aa string into the buffer (strncpy/memcpy)
• copy the bb string (strcpy/memcpy)
• copy the rest of the aa string (strncpy/memcpy)