31 - memmove()函数

1 函数原型

memmove()：移动内存块，函数原型如下：

void * memmove ( void * destination, const void * source, size_t num );

cstring库描述如下：

Move block of memory
1. Copies the values of num bytes from the location pointed by source to the memory block pointed by destination.
2. Copying takes place as if an intermediate buffer were used, allowing the de