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6 Designing algorithms Top-down design Structure diagrams Design steps The complete design process
7 Subroutines and file handling
Why use subroutines? 141 Subroutines in Visual Basic 142 Functions 143 Procedures 149 File handling 155
8 Checking inputs 8.1 8.2 8.3
Validation 163 Verification 164 Programming validation into your systems 165
When to test 186 Debugging 186 IDE debugging tools and diagnostics 188 Identifying logical errors 190 Dry running 190 Breakpoints, variable tracing and stepping through code 193 Beta testing 195
A
9.1 9.2 9.3 9.4 9.5 9.6
M
9 Testing
9.7
What is an array? Declaring a one-dimensional array
S
11.1 11.2 11.3 11.4 11.5
Concatenation 235 Splitting strings 237 String index 237 Substring 241 Looping through all the characters in a string 244
12 Programming scenario task 12.1 12.2 12.3 12.4 12.5 12.6
Getting started on the question Planning the program Planning your solution Writing your program Checking your program Final thoughts
13 Examination practice
248 249 250 251 253 254
258
Glossary 268 Acknowledgements 271
10 Arrays 10.1 10.2
11 Manipulating strings
P
7.1 7.2 7.3 7.4 7.5
129 129 132 138
Initialising arrays 202 Using arrays 203 Iteration in arrays 208 Grouped data records 212 Two-dimensional arrays 217 Sorting 224 Sorting algorithms 225 Bubble sort 226
LE
6.1 6.2 6.3 6.4
10.3 10.4 10.5 10.6 10.7 10.8 10.9 10.10
201 201
Solutions
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