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→To Do 10
* I tried the first function at http://yun811.blogspot.ca/ Yun Yang's oop344
* My drafts on char* bits(unsigned int val) : http://itactics.wordpress.com/2012/11/20/code-how-to-print-binary/ (Diaoqiang He)
* I have the solutions for all of three functions at my blog - http://linpei.blogspot.ca/
* I did the void prnBits function in one line:
* void prnBits(int val){
