snapshot before regression test

includes/stdio.py

@@ -0,0 +1,16 @@
+import t, c
+
+
+def printf(fmt: t.CConst | str, *args) -> t.CInt | t.State: pass
+def fprintf(stream: bytes, fmt: t.CConst | str, *args) -> t.CInt | t.State: pass
+def sprintf(buf: bytes, fmt: t.CConst | str, *args) -> t.CInt | t.State: pass
+def snprintf(buf: bytes, size: t.CSizeT, fmt: t.CConst | str, *args) -> t.CInt | t.State: pass
+def puts(s: t.CConst | str) -> t.CInt | t.State: pass
+def fputs(s: t.CConst | str, stream: bytes) -> t.CInt | t.State: pass
+def fgets(buf: bytes, size: t.CInt, stream: bytes) -> bytes | t.State: pass
+def fflush(stream: bytes) -> t.CInt | t.State: pass
+
+# 标准流指针（全局变量，仅声明供 printf 等函数使用）
+stdin:  bytes = 0
+stdout: bytes = 0
+stderr: bytes = 0