C Program Examples

• mywc.C - a program that counts the number of lines, words, and characters in its input. This program has examples of comments, #includes, constant and variable declarations, a main() function, and if, while, printf(), expression, and assignment statements.

• ftoctab.C - a program that prints a conversion table for converting from degrees Fahrenheit to degrees Celsius. This program has examples of functions, for loops, and the use of floating point numbers.

  Functions are an important aspect of program design. Good program design involves breaking up the computation into small functions that are easy to comprehend.

• fact.C - a program that computes the factorial of a number. This program illustrates the behavior of C function parameters.

• copy.C - a program that copies one file to another. This program illustrates character processing in C. It also illustrates how programs can be designed for use with redirected input and output.

• copy1.C - the same as copy.C except that files are named on the command line instead of using redirection. This program illustrates the use of command-line parameters. It also illustrates how files other than the standard files can be accessed.

• myecho.C - a program that echoes the arguments in its command line. This program illustrates the use of command-line parameters. It also illustrates the use of arrays.

• printfdemo.C - a program that prints integers, reals, and strings using various printf() format specifiers. This program also illustrates initialization of array variables.

• hail.C - a program that prints the iterated values of a curious function. This program has a function with reference parameters. The reference parameters are implemented using pointers. This program also illustrates the use of command-line parameters.

• hail1.C - the same as hail.C, except that reference parameters are implemented with C++ reference types. This is much easier to understand than the use of pointers.

• mywc1.C - the same as mywc.C, except that an enumerated type is used to keep track of program state, and the file that it processes is specified by a command-line argument. This program illustrates the use of FILE * variables and the use of fopen() to open a file.

• quicksort.C - a demonstration and explanation of the quicksort algorithm for sorting arrays of data. This program illustrates the use of arrays.

Printing the Notes