问题4：你有没有想到过这样的问题C语言的编译程序用什么语言来写？可以就用C语言写吗？
Source解释ProgramInterpretingRubyMachineLanguageInterpreterCPUit is usuallyeasier to write a"quick-and-dirty"but reasonably useful,interpreterthanitistowriteareasonablecompiler,interpreter-drivenexecution yields amoretraceable account of what is happeningespeciallywhen working interactively withthe computerthroughaterminal withadisplayscreen
解释 Interpreting
问题5：从程序执行的角度来看编译与解释两种方式的差别是什么？