C Programming for the Absolute Beginner phần 2 ppsx

A simple correction to the comment block, shown next, will solve the issue and allow the

program to compile successfully.

/* This corrects the previous comment block error */

SUMMARY

• Functions allow you to group a logical series of activities, or program statements, under

one name.

• Functions can take in and pass back information.

• An algorithm is a finite step-by-step process for solving a problem.

• Each function implementation requires that you use a beginning brace ({) and a closing

brace (}).

• Comments help to identify program purpose and explain complex routines.

• The character set /* signifies the beginning of a comment block and the character set

*/ identifies the end of a comment block.

• There are 32 words defined as keywords in the standard ANSI C programming language;

these keywords have predefined uses and cannot be used for any other purpose in a C

program.

• Most program statements control program execution and functionality and may require

a program statement terminator (;).

• Program statements that do not require a terminator include preprocessor directives,

comment blocks, and function headers.

• The printf() function is used to display output to the computer screen.

• When combined with the backslash (\), special characters such as n make up an escape

sequence.

• The library name stdio.h is short for standard input output and contains links to various

standard C library functions, such as printf().

• C compilers such as gcc preprocess program code, generate error codes and messages if

applicable, compile program code into object code, and link any necessary libraries.

• Compile errors are generally the result of syntax issues, including missing identifiers

and terminators, or invalid directives, escape sequences, and comment blocks.

• A single error at the top of your program can cause cascading errors during compile

time.

• The best place to start debugging compile errors is with the first error.

24 C Programming for the Absolute Beginner, Second Edition

Challenges

1. Study the VIM Quick Guide as described in Appendix B.

2. Study the nano Quick Guide as described in Appendix C.

3. Create a program that prints your name.

4. Create a program that uses escape sequence \" to print your

favorite quote.

5. Create a program that uses escape sequence \\ to print the fol￾lowing directory structure: c:\cygwin\home\administrator.

6. Write a program that prints a diamond as demonstrated next.

*

* *

* *

* *

* *

* *

*

7. Create a calendar program using the current month (similar to

the one shown in Figure 1.6).

Chapter 1 • Getting Started with C Programming 25