C Program Workshop - C Programming - Lecture Slides, Slides of Computer Science

Download C Program Workshop - C Programming - Lecture Slides and more Slides Computer Science in PDF only on Docsity!

THE C Program Workshop

Workshop Features

Door for expected results to go out

Door for requests to go in

Door for unexpected results to go out

Bins for parts and supplies

Various tools

WORKSHOP

X Y Z

A B C D

Instructions and operating procedures

Communication with other shops

C Program Entrances and Exits

STANDARD

OUT (stdout)

STANDARD

IN (stdin)

STANDARD

ERROR (stderr)

Constants and variables

Operations and functions

main

X Y Z

A B C D

Instructions and operating procedures

File and Device Input/Output

Data Types

• Integers ( int )

• Numbers with decimal points ( float )

• Characters ( char )

• Words and Phrases (ex. char phrase[10] )

• Tables (ex. int values[10] , float matrix[20][30] )

• Records (ex. struct myRecordType )

Simple Operations

• Storage (=)

• Addition (+)

• Subtraction (-)

• Multiplication (*)

• Division (/)

• Modulo (%)

• Comparison (==, !=, <, <=, >, >=)

Instructions and Decisions

• variableLocation = expression
  • Ex. count = 17 * MAX_LOOPS;
• if (Boolean condition) statement else statement
  • Ex. if (numberIsValid) count++; else count--;
• while (Boolean condition) statement
  • Ex. while (count > MAX_LOOPS) count = count – 5;
• for (statement; condition; statement) statement
  • Ex. for (i = 0; i < size; i++) printf(“%d\n”, table[i]);

Standard C Library Functions

• Standard Input and Output:

• printf, scanf, getchar, gets

• Conversion of Data:

• isalpha, isdigit, tolower, toupper

• Math:

• sin, cos, tan, sqrt, log, exp

• Working with Files:

• fopen, fclose, fscanf, fprintf, fgets

Example Program - C Source Code

int main(void) { int theCheckNbr; char theAccount; char theTaxCode; float theAmount; float theBalance; theBalance = 2391.52; printf("Ck Nbr Acct Tax Amount Balance\n"); printf("------ ---- --- ------ -------\n"); theCheckNbr = 234; theAccount = ‘B'; theTaxCode = ‘Z'; theAmount = 34.56; theBalance = theBalance - theAmount; printf("%6d %2c %2c %6.2f %7.2f\n", theCheckNbr, theAccount, theTaxCode, theAmount, theBalance); return 0; } // End main

Example Program Exercise

• Using the current pattern of statements in the

program, add the source code to display the last two

lines of the report shown below

• Also, change the order of the report columns

Ck Nbr Amount Acct Balance Tax

---

234 34.56 B 2356.96 Z 235 192.73 T 2164.23 W 236 75.00 G 2089.23 X