CSCI 1312 (Introduction to Programming for Engineering):
Sample Programs

Disclaimer: Code linked from this page is intended as a cleaned-up and commented version of examples from class. Many programs could be further improved with regard to functionality or design, but then they would no longer be as close to what we did in class.

Programs

• "Hello, world" program: hello.c.
• Simple example from 9/11 class (revised 9/14): example-simple.c.
• "Make change" example: make-change.c.
• Simple example of if/else: example-conditional.c.
• Programs to solve quadratic equations (real roots only), multiple versions:
  • quadratic.c.
  • quadratic-revised.c.
  • quadratic-revised-again.c.
• Simple examples of recursion, mostly from class:
  • factorial.c.
  • countdown.c.
  • fibonacci.c.
  • reverse.c.
  • sum-recurse.c (not from class, for comparison with sum-while.c below).
• Simple examples of loops, mostly from class:
  • factorial-loop.c (loop version of factorial.c above).
  • fibonacci-loop.c (loop version of fibonacci.c above)
  • sum-while.c.
  • print-square.c (not from class, intended to help with Homework 4).
• More examples of loops:
  • num-int-1.c.
  • num-int-2.c.
• Example of use of arrays:
  • variance.c (version from class).
  • variance-2.c (slightly improved version).
• "Floating point is strange" examples:
  • strange-float-1.c.
  • strange-float-2.c.
• Example of "Monte Carlo" calculation: monte-carlo-1.c.
• Example of using command-line arguments: echo-args.c.
• Examples of simple I/O:
  • copy.c.
  • copy-file.c.
  • sum-while-file.c.
• Example of pointer arithmetic and string function: pointer-arith.c.
• Example of working with multiple files and character functions (not from class): countchars.c.
• Examples of things mentioned only briefly in class:
  • Use of dynamic memory allocation (malloc) to create a 1D array, and of converting command-line arguments to numbers (strtol): array-dynamic.c.
  • Various ways of creating a 2D array: array2d.c.
  • Use of struct to create a user-defined type (for points in 2D space) struct-example.c.

Other files

• Script to mail files for homework submission mail-files. To use this script, put a copy in your directory and use chmod u+x to make it executable. You can then use it to mail me one or more files containing source code, for example:

  	mail-files pgm1.c pgm2.c ....
  	

  It prompts for homework number and text to include as the body of the message, and sends a Cc of the message to your username at trinity.edu.
• Sample makefile Makefile for compiling C programs. Note: To obtain a makefile, use your browser's download function; cutting and pasting will likely turn the tabs in the makefile into spaces and cause it to not work. Put the makefile in the directory in which you want to compile. All the makefiles linked from this page begin with brief documentation on their use (the "usage examples").
• Script to compile C program with recommended options compile-c. To use this script, put a copy in your directory and use chmod u+x to make it executable. Then you can type compile-c followed by the name of your source file to compile with recommended options and create an executable with a name based on the sourcefile name (e.g., hello from hello.c.