This is a simple C program that copies the contents of one file onto another file. It is similar to Unix’s cp command. This C program is called with two parameters i.e. the names of two files. The contents of the file referenced in second parameter are copied onto the file which is referenced by first parameter.
This source code is from Thinking in C++, 2nd Edition, Volume 2, by Bruce Eckel & Chuck Allison. You can use Borland, G++ (For version 3 and above only), Microsoft (For C++ with .NET only) to compile and build this source code. Writing perfect software may be a daunting task for developers, but a few defensive techniques which are routinely applied can go a long way toward narrowing the gap between code and ideal. Defensive programming practices are often used where high availability of the application is required, safety if utmost concern, or security is needed for application to work.
This C program uses enumerated types to display days of week. The enumerated type is then declared as a different name using typedef keyword i.e. enum days to typedef enum days days. The function prints for each day of the week, today, yesterday, and tomorrow, both as a string and as a number.
This is a C implementation of basic and few advance scientific features of calculator. It shows a nice graphical UI of the calculator with 3D buttons and demonstrates click button animation functionality. The functionalities of the calculator includes: Basic Mathematics (Add, Subtract, Multiply and Divide), Advance Mathematics (Square root, Square, Cube), Logarithmic Functions (Log, Natural Log (ln), e, Exponential), Number Conversions (Binary, Decimal, Hexadecimal and Octal), Trigonometric Functions (Sine, Cosine, Tangent, Cotangent, Secant and Cosecant), Angle Measurement (Degree, Radia and Gradian), Other Functions (Memory, Pi and Inv).