#include<stdio.h>
int my_strlen(char* p)
{
	int count = 0;
	while (*p++)
	{
		count++;

	}
	return count;
}
int main()
{
	char arr[] = "abcdef";
	int ret = my_strlen(arr);
	printf("%d", ret);
	return 0;
}


#include<stdio.h>
void my_strcpy(char* p1, char* p2)
{
	while (*p1 ++= *p2++)
	{

	}
}
int main()
{
	char arr1[] = "********";
	char arr2[] = "hello";
	my_strcpy(arr1, arr2);
	printf("%s", arr1);
	return 0;

}