Computer Science: A Structured Programming Approach Using C1 2-7 Input/Output Although our programs...

Computer Science: A Structured Programming Approach Using C 1

2-7 Input/Output

Although our programs have implicitly shown how to Although our programs have implicitly shown how to print messages, we have not formally discussed how we print messages, we have not formally discussed how we use C facilities to input and output data. We devote two use C facilities to input and output data. We devote two chapters, Chapter 7 and 13, to fully explain the C chapters, Chapter 7 and 13, to fully explain the C input/output facilities and how to use them. In this input/output facilities and how to use them. In this section, we describe simple input and output formatting.section, we describe simple input and output formatting.

StreamsFormatting Input/Output

Topics discussed in this section:Topics discussed in this section:

A terminal keyboard and monitor can be associated only with a text stream. A keyboard is a source

for a text stream; a monitor is a destination for a text stream.

NoteNote

FIGURE 2-15 Stream Physical Devices

FIGURE 2-16 Output Formatting Concept

FIGURE 2-17 Output Stream Formatting Example

FIGURE 2-18 Conversion Specification

Table 2-10 Format Codes for Output

Table 2-11 Flag Formatting Options

FIGURE 2-19 Formatting Text from an Input Stream

FIGURE 2-20 Input Stream Formatting Example

FIGURE 2-21 Conversion Specification

scanf requires variable addresses in the address list.

NoteNote

Table 2-12 scanf Rules

2-8 Programming Examples

In this section, we show some programming example to In this section, we show some programming example to emphasize the ideas and concepts we have discussed emphasize the ideas and concepts we have discussed about input/output.about input/output.

PROGRAM 2-4 A Program That Prints “Nothing!”

PROGRAM 2-5 Demonstrate Printing Boolean Constants

PROGRAM 2-5 Demonstrate Printing Boolean Constants (continued)

PROGRAM 2-6 Print Value of Selected Characters

PROGRAM 2-6 Print Value of Selected Characters (continued)

PROGRAM 2-7 Calculate a Circle’s Area and Circumference

PROGRAM 2-7 Calculate a Circle’s Area and Circumference (continued)

FIGURE 2-22 Output Specifications for Inventory Report

PROGRAM 2-8 A Sample Inventory Report

PROGRAM 2-8 A Sample Inventory Report (continued)

FIGURE 2-23 Complex Number Attributes

PROGRAM 2-9 Print Complex Number Attributes

PROGRAM 2-9 Print Complex Number Attributes (continued)

PROGRAM 2-10 Complex Number Arithmetic

PROGRAM 2-10 Complex Number Arithmetic (continued)

Computer Science: A Structured Programming Approach Using C1 2-7 Input/Output Although our programs...

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