iccavr编译器下的源代码

				#include 
				
				char *strncpy(char *s1, CONST char *s2, size_t n)
					{
					char *s = s1;
					
					for ( ;*s2 && n; n--)
						*s1++ = *s2++;
					while (n--)
						*s1++ = 0;
					return s;
					}