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202.tex

@@ -1,5 +1,5 @@
 \documentclass{article}
-\author{G.~Weigt}
+%\author{gweigt}
 \title{Note on SMP safety}
 \date{\today}
 \begin{document}
@@ -117,4 +117,4 @@ the resulting file \verb$test.s$:
 
 
 
-\end{document}
+\end{document}

203.tex

@@ -0,0 +1,58 @@
+\documentclass{article}
+\begin{document}
+
+\section*{Virtual inheritance}
+
+Let $baz$ inherit from $A$ and $B$.
+If both $A$ and $B$ inherit $foo$ virtually,
+then an instantiation of $baz$ has only one $foo$.
+
+\medskip
+\noindent
+\begin{verbatim}
+#include <stdio.h> 
+
+class foo 
+{ 
+public: 
+     int whatever; 
+}; 
+
+class A : public virtual foo 
+{ 
+public: 
+     int a; 
+}; 
+
+class B : public virtual foo 
+{ 
+public: 
+     int b; 
+}; 
+
+class baz : public A, public B 
+{ 
+public: 
+     int c; 
+}; 
+
+main() 
+{ 
+     baz z; 
+     z.A::whatever = 1; 
+     z.B::whatever = 2; 
+     printf("%d %d\n", z.A::whatever, z.B::whatever); 
+} 
+\end{verbatim}
+
+\medskip
+\noindent
+The result of running this program is
+
+\medskip
+\noindent
+\begin{verbatim}
+2 2
+\end{verbatim}
+
+\end{document}