Chapter 1 - A Tutorial Introduction

Ex No	Pg No	Exercise	Solution	Solved by
1	8	Run the "hello world" program on your system. Experiment with leaving out parts of the program, to see what error messages you get.	Listing krx101	Richard Heathfield
2	8	Experiment to find out what happens when printf 's argument string contains \c, where c is some character not listed above.	Listing krx102	Richard Heathfield
3	13	Modify the temperature conversion program to print a heading above the table.	Listing krx103	Richard Heathfield
4	13	Write a program to print the corresponding Celsius to Fahrenheit table.	Listing krx104	Richard Heathfield
5	14	Modify the temperature conversion program to print the table in reverse order, that is, from 300 degrees to 0.	Listing krx105	Category 0 Solutions by Richard Heathfield and by Chris Sidi.
6	17	Verify that the expression getchar() != EOF is 0 or 1.	Listing krx106	Richard Heathfield
7	17	Write a program to print the value of EOF.	Listing krx107	Richard Heathfield
8	20	Write a program to count blanks, tabs, and newlines.	Listing krx108	Richard Heathfield
9	20	Write a program to copy its input to its output, replacing each string of one or more blanks by a single blank.	Listing krx109	Category 0 Solutions by Richard Heathfield, by Chris Sidi, and by Stig Brautaset.
10	20	Write a program to copy its input to its output, replacing each tab by \t , each backspace by \b , and each backslash by \\ . This makes tabs and backspaces visible in an unambiguous way.	Listing krx110	A couple of solutions here. One from Richard Heathfield, and one from Gregory Pietsch.
11	21	How would you test the word count program? What kinds of input are most likely to uncover bugs if there are any?	Listing krx111	Solution by Dann Corbit. Solution to Dann's follow-up challenge by Gregory Pietsch.
12	21	Write a program that prints its input one word per line.	Listing krx112	Richard Heathfield
13	24	Write a program to print a histogram of the lengths of words in its input. It is easy to draw the histogram with the bars horizontal; a vertical orientation is more challenging.	Listing krx113	Richard Heathfield
14	24	Write a program to print a histogram of the frequencies of different characters in its input.	Listing krx114	Richard Heathfield
15	27	Rewrite the temperature conversion program of Section 1.2 to use a function for conversion.	Listing krx115	Richard Heathfield
16	30	Revise the main routine of the longest-line program so it will correctly print the length of arbitrarily long input lines, and as much as possible of the text.	Listing krx116	"386sx" and Richard Heathfield.
17	31	Write a program to print all input lines that are longer than 80 characters.	Listing krx117	"MJSR"
18	31	Write a program to remove all trailing blanks and tabs from each line of input, and to delete entirely blank lines.	Listing krx118	Solution by Ben Pfaff, modification by Chris Sidi
19	31	Write a function reverse(s) that reverses the character string s . Use it to write a program that reverses its input a line at a time.	Listing krx119	Richard Heathfield
20	34	Write a program detab that replaces tabs in the input with the proper number of blanks to space to the next tab stop. Assume a fixed set of tab stops, say every n columns. Should n be a variable or a symbolic parameter?	Listing krx120	Richard Heathfield & others
21	34	Write a program entab that replaces strings of blanks with the minimum number of tabs and blanks to achieve the same spacing. Use the same stops as for detab . When either a tab or a single blank would suffice to reach a tab stop, which should be given preference?	Listing krx121	Rick Dearman
22	34	Write a program to "fold" long input lines into two or more shorter lines after the last non-blank character that occurs before the n -th column of input. Make sure your program does something intelligent with very long lines, and if there are no blanks or tabs before the specified column.	Listing krx122	Category 1 Solution by Rick Dearman
23	34	Write a program to remove all comments from a C program. Don't forget to handle quoted strings and character constants properly. C comments do not nest.	Listing krx123	This was the first exercise for which solutions were submitted en masse from comp.lang.c, and as a result, quite a few solutions have been provided here. You may find it interesting to compare and contrast different approaches to the same problem.
24	34	Write a program to check a C program for rudimentary syntax errors like unbalanced parentheses, brackets and braces. Don't forget about quotes, both single and double, escape sequences, and comments. (This program is hard if you do it in full generality.)	Listing krx124	Solutions by Rick Dearman and others