🆕 malloc 、printf

user/libs/libc/math.h

@@ -0,0 +1,10 @@
+#pragma once
+
+
+double fabs(double x);
+float fabsf(float x);
+long double fabsl(long double x);
+
+double round(double x);
+float roundf(float x);
+long double roundl(long double x);