copy_n.c

c和指针 学习c语言必须阅读的书籍之一 提高对C语言的掌握理解能力

/*
** Copy exactly N characters from the string in src to the dst
** array (padding with NULs if needed).
*/
void
copy_n( char dst[], char src[], int n )
{
	int	dst_index, src_index;

	src_index = 0;

	for( dst_index = 0; dst_index < n; dst_index += 1 ){
		dst[dst_index] = src[src_index];
		if( src[src_index] != 0 )
			src_index += 1;
	}
}