字符串函数-strcpy

strcpy

char *strcpy(char *dest, const char *src);
char *strncpy(char *dest, const char *src, size_t n);

• 功能：拷贝字符串
• 返回值：dest地址，失败返回NULL
• 特点：无法检测dest是否可以容纳src长度

mystrcpy

void mystrcpy(char* dest, const char* src)
{
	if (dest==NULL||src==NULL)
	{
		exit(1);
	}
	int i = 0;
	while (src[i]!='\0')
	{
		dest[i] = src[i];
		i++;
	}
	dest[i] = '\0';
}