C Reference String Operation: memmove()

The function memmove() copies n characters from source to target.

Usage:

void *memmove(void *target, void *source, size_t count);

Note: The copy still works if the objects overlap.

memmove() source code example:

	#include<stdio.h>
	#include<string.h>

	main()
	{
		char line[100];
		char *ptr_my;

		ptr_my=&line[0];
		strcpy(ptr_my, "aaa");

		memmove(&ptr_my[3], "bbb", 2);

		ptr_my[5]='\0';
		printf("%s\n", ptr_my);
	}

Note: we give three b’s, but the count is set to 2. Make the ‘\0’ is put at the right position.

Output of the example:

	aaabb