CSCI 1120 (Low-Level Computing):
Sample Programs

Programs

• "Hello, world" program: hello.c.
• Simple example of variables, expressions, and I/O: simple.c. Revised to check for input errors: simple-with-check.c.
• Simple examples of functions: simple-fcn.c, factorial.c.
• Program to compute sum of integers using loop: while-sum.c.
• Simple example of for loops and array: simple-array.c.
• Simple example of function with pointer arguments: divide.c.
• Simple example of working with strings, various ways: simple-strings.c.
• Program to get and echo a line of text: echo-line.c.
• Program to echo command-line arguments: echo-args.c.
• Program to compare two strings, ignoring case and leading space: compare.c.
• Program to sum integers read from file: while-sum-fromfile.c.
• Program to copy one file to another: copy-file.c.
• Program combining echo-text.c and copy-file.c: combined-copy.c.
• "Floating point is strange" examples: strange-float-1.c, strange-float-2.c.
• Starter sort program (not in class): sorter-start.c.
• Improved/completed sort program: sorter-improved.c.
• Simple example of function with function-pointer parameter: function-pointer.c.
• Makefile example: Source code files and Makefiles here.
• Different ways to make 2D arrays: two-D-array.c.
• Simple example of struct (simplified bank account): simple-struct.c.
• Linked-list example: Source code files and Makefile here.
• Program illustrating how sizes of data types can vary: sizes.c.
• Examples of multithreading here.
• Examples of text-mode GUIs here.

Sample solutions to in-class practice problems

• Recursion (week of 1/30): recurse-sum.c, recurse-reverse.c.
• Loops and arrays (week of 2/06): while-reverse.c.
• Pointers as arguments (week of 2/13): roots.c.
• Strings (week of 2/20): all-caps.c, find-string.c.
• Files (week of 2/27): copycat.c.

Other files

• Script to mail files for homework submission mail-files. Instructions for usage here.

• Sample 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").