scc

 1#include <assert.h>
 2#include <stdio.h>
 3#include <string.h>
 4
 5/*
 6output:
 7testing
 8done
 9end:
10*/
11
12int
13main()
14{
15	char buf[30];
16
17	puts("testing");
18
19	memcpy(buf, "abcdef", 6);
20	assert(!memcmp(memmove(buf, buf+3, 3), "def", 3));
21	memcpy(buf, "abcdef", 6);
22	assert(!memcmp(memmove(buf, buf+3, 0), "abc", 3));
23
24	puts("done");
25
26	return 0;
27}