computer science: a structured programming approach using c1 13-3 converting file type a rather...
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Computer Science: A Structured Programming Approach Using C 1
13-3 Converting File Type
A rather common but somewhat trivial problem is to A rather common but somewhat trivial problem is to convert a text file to a binary file and vice versa. C has convert a text file to a binary file and vice versa. C has no standard functions for these tasks. We must write a no standard functions for these tasks. We must write a program to make the conversion. We describe the file program to make the conversion. We describe the file conversion logic in this section.conversion logic in this section.
Creating a Binary File from a Text FileCreating a Text File from a Binary File
Topics discussed in this section:Topics discussed in this section:
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FIGURE 13-14 Create Binary File Structure Chart
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PROGRAM 13-5 Text to Binary Student File
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PROGRAM 13-5 Text to Binary Student File
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PROGRAM 13-5 Text to Binary Student File
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PROGRAM 13-5 Text to Binary Student File
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PROGRAM 13-5 Text to Binary Student File
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PROGRAM 13-5 Text to Binary Student File
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FIGURE 13-15 Design for Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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PROGRAM 13-6 Print Student Data
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13-4 File Program Examples
This section contains two common file applications. This section contains two common file applications. The first uses the file positioning functions to The first uses the file positioning functions to randomly process the data in a file. The second merges randomly process the data in a file. The second merges two files.two files.
Random File ProcessingMerge Files
Topics discussed in this section:Topics discussed in this section:
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PROGRAM 13-7 Random File Application
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PROGRAM 13-7 Random File Application
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PROGRAM 13-8 Random File: Build File
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PROGRAM 13-8 Random File: Build File
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PROGRAM 13-9 Random File: Sequential Print
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PROGRAM 13-9 Random File: Sequential Print
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PROGRAM 13-10 Random File: Random Print
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PROGRAM 13-10 Random File: Random Print
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FIGURE 13-16 File Merge Concept
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ALGORITHM 13-1 Pseudocode for Merging Two Files
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PROGRAM 13-11 Merge Two Files
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PROGRAM 13-11 Merge Two Files
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PROGRAM 13-11 Merge Two Files
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PROGRAM 13-11 Merge Two Files
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13-5 Software Engineering
Any file environment requires some means of keeping Any file environment requires some means of keeping the file current. The function that keeps files current is the file current. The function that keeps files current is known as known as updating. To complete our discussion of . To complete our discussion of files, we discuss some of the software engineering files, we discuss some of the software engineering design considerations for file updating. design considerations for file updating.
Update FilesSequential File UpdateThe Update Program DesignUpdate ErrorsUpdate Structure Chart and Logic
Topics discussed in this section:Topics discussed in this section:
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FIGURE 13-17 Sequential File Update Environment
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FIGURE 13-18 File Updating Example
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FIGURE 13-19 Update Structure Chart
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ALGORITHM 13-2 Pseudocode for File Update