C achieved by a command line calculator, including+,-,*,/, negative numbers, decimal point, a number, and the absolute value can be added to this a bit challenging, I am rather proud of the point (boastfulness ah .)

Calculate_2\cal.dsp
...........\cal.dsw
...........\cal.ncb
...........\cal.opt
...........\cal.plg
...........\Debug\cal.exe
...........\.....\cal.ilk
...........\.....\cal.pch
...........\.....\cal.pdb
...........\.....\fun.obj
...........\.....\main.obj
...........\.....\vc60.idb
...........\.....\vc60.pdb
...........\fun.c
...........\main.c
...........\main.h
...........\main.h.gch
...........\Debug
Calculate_2

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