Answers to Self-Test Exercises in Software

Create ECC200 in Software Answers to Self-Test Exercises
Answers to Self-Test Exercises
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10 #include <cstring>
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//needed to get the declaration of strcpy strcpy(aString, "Hello");
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11 I did it my way! 12 The string "good, I hope" is too long for aString A chunk of memory that doesn t belong to the array aString will be overwritten 13 The complete dialogue is as follows:
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Enter some input: The time is now The-time<END OF OUTPUT
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14 The complete dialogue is as follows:
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Enter a line of input: May the hair on your toes grow long and curly May t<END OF OUTPUT
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15 The complete dialogue is as follows:
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Enter a line of input: a b c d e f g a b END OF OUTPUT
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16 The complete dialogue is as follows:
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Enter a line of input: abcdef gh ace h
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Note that the output is simply every other character of the input, and note that the blank is treated just like any other character 17 The complete dialogue is as follows:
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Enter a line of input: 0 1 2 3 4 5 6 7 8 9 10 11 01234567891 1
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Be sure to note that only the 1 in the input string 10 is output This is because cinget is reading characters, not numbers, and so it reads the input 10 as the two characters 1 and 0 Since this code is written to echo only every other character, the 0 is not output Since the 0 is not output, the next character, which is a blank, is output, and so there is one blank in the output Similarly, only one of the two 1 characters in 11 is output If this is unclear, write the input on a sheet of paper and use a small square for the blank character Then, cross out every other character; the output shown above is what is left
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Strings
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18 This code contains an infinite loop and will continue as long as the user continues to give it input The Boolean expression (next != \n ) is always true because next is filled via the statement
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cin >> next;
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and this statement always skips the newline character, \n (as well as any blanks) The code will run, and if the user gives no additional input, the dialogue will be as follows:
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Enter a line of input: 0 1 2 3 4 5 6 7 8 9 10 11 0246811
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This code outputs every other nonblank character The two 1 characters in the output are the rst character in the input 10 and the rst character in the input 11 19 The complete dialogue is as follows:
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Enter a line of input: I ll see you at 10:30 AM I ll see you at 1<END OF OUTPUT
20 cout << "Enter a line of input:\n";
char next; do { cinget(next); if (!isupper(next)) cout << next; } while (next != \n );
Note that you should use !isupper(next) and not use islower(next) This is because islower(next) returns false if next contains a character that is not a letter (such as the blank or comma symbol) 21 //Uses iostream:
void newLine( ) { cinignore(10000, \n ); }
Of course, this only works for lines less than about 10,000 characters, but any lines longer than that would likely indicate some other unrelated problem 22 A*string<END OF OUTPUT 23 A string is a joy forever!<END OF OUTPUT
Programming Projects
24 The complete dialogue is as follows:
Enter a line of input: Hello friend! Equal
25 Hello Jello
PROGRAMMING PROJECTS
1 Write a program that will read in a sentence of up to 100 characters and output the sentence with spacing corrected and with letters corrected for capitalization In other words, in the output sentence all strings of two or more blanks should be compressed to a single blank The sentence should start with an uppercase letter but should contain no other uppercase letters Do not worry about proper names; if their first letter is changed to lowercase, that is acceptable Treat a line break as if it were a blank in the sense that a line break and any number of blanks are compressed to a single blank Assume that the sentence ends with a period and contains no other periods For example, the input