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[] = "012321";
16
17	puts("testing");
18	assert(strrchr(buf, '1') == buf+5);
19	assert(strrchr(buf, '0') == buf);
20	assert(strrchr(buf, '3') == buf+3);
21	assert(strrchr("",  '0') == NULL);
22	assert(strrchr(buf, 'a')  == NULL);
23	assert(strrchr(buf, 0) == buf+6);
24	puts("done");
25
26	return 0;
27}