What are the most efficient ways to create variables in C? [closed]

What are the most efficient ways to create variables in C? [closed]

References

Reference NO 1

http://stackoverflow.com/questions/12903754/whats-a-good-way-of-declaring-instance-variables-in-c-without-constructing-th

Reference NO 2

http://stackoverflow.com/questions/17333/most-effective-way-for-float-and-double-comparison

Reference NO 3

http://www.chemie.fu-berlin.de/chemnet/use/info/libc/libc_3.html

Reference NO 4

http://c2.com/cgi/wiki?GlobalVariablesAreBad

Reference NO 5

http://en.wikibooks.org/wiki/C%2B%2B_Programming/Classes/Member_Functions

Reference NO 6

http://perldoc.perl.org/perlsub.html

Reference NO 7

http://www.possibility.com/Cpp/const.html

Reference NO 8

http://en.wikipedia.org/wiki/Variable_(computer_science)