In the C standard library, header names end with a .h suffix:
stdio.h
In C++, those header names are available in an alternative form, with a c prefix instead:
cstdio
Write a function that converts the first form into the second. You can do the conversion in-place, or leave the original string intact and return a new string. Whatever feelds natural in your language of choice.
The code must be compiled/interpreted without errors. Compiler warnings are acceptable.
Here is your baseline C solution. It has 70 characters and generates a warning about strlen:
void f(char*h){int i=strlen(h);h[--i]=0;while(--i)h[i]=h[i-1];*h='c';}
The shortest solution (measured in number of characters) wins.
Update: If your language of choice does not support functions, whole programs are also acceptable.
Update: As suggested by FUZxxl, here is a complete list of the header files in the C standard library:
assert.h
ctype.h
errno.h
float.h
limits.h
locale.h
math.h
setjmp.h
signal.h
stdarg.h
stddef.h
stdio.h
stdlib.h
string.h
time.h
Specifically, there are no header names with multiple dots in them.
