Tricky C questions
以下是几个棘手的
C 问题, 很难做, 看看自己会做几个?
How do you write a program which produces its own source code as its output?
How can I find the day of the week given the date?
Why doesn’t C have nested functions?
What is the most efficient way to count the number of bits which are set in a value?
How can I convert integers to binary or hexadecimal?
How can I call a function, given its name as a string?
How do I access command-line arguments?
How can I return multiple values from a function?
How can I invoke another program from within a C program?
How can I access memory located at a certain address?
How can I allocate arrays or structures bigger than 64K?
How can I find out how much memory is available?
How can I read a directory in a C program?
How can I increase the allowable number of simultaneously open files?
What’s wrong with the call fopen(”c:\newdir\file.dat”, “r”)
?
without using third variable how to swap two variable?
print a semicolon without using semicolon else where in the program ?
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问题源于论坛的一道题目：
http://topic.csdn.net/u/20100216/21/ec98464e-a47e-4263-bb1c-a001e130ba87.html
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原帖一：http://blog.csdn.net/dotphoenix/archive/2009/05/20/4203075.aspx
原贴二：http://www.cocoachina.com/bbs/read.php?tid-8008.html
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