Function test_append

lib_acl_cpp/samples/string/string5/main.cpp:7–12

#include <iostream>

static void test_append(acl::string& buf)
{
	for (size_t i = 0; i < 50; i++) {
		buf.format_append("%zd->hello world!\r\n", i);
	}
}

static void test_mmap_write(int max, size_t off)
{