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 ?
本文来自博客，转载请标明出处：http://blog.csdn.net/zouzhongyu/archive/2010/03/09/5359092.aspx
