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Chapter 10: Problem 34

T \(F \quad\) If toupper's argument is already uppercase, it is returned as is, with no changes.

Short Answer

Expert verified
Answer: T

Step by step solution

01

Understanding the toupper function

The toupper function is a string manipulation function that takes a character as input and returns the uppercase version of that character if it is lowercase. If the input character is already uppercase or not an alphabet (e.g., a number or special character), it is returned unchanged.
02

Analyzing the given statement

The statement we are given is: If toupper's argument is already uppercase, it is returned as is, with no changes. This statement is in line with the description of the toupper function as described in Step 1.
03

Testing the statement with an example

Let's take an example to test the given statement. Suppose the input character is 'A' (which is already in uppercase). According to the statement, the toupper function should return the character 'A' without any changes. Let's apply the toupper function on 'A': toupper('A') = 'A' As we can see, the output is 'A', which is the same as the input. This demonstrates that the statement is true for this example.
04

Conclusion

Based on our understanding of the toupper function and the test with an example, we can conclude that the given statement is True (T). So the correct answer is: T

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Most popular questions from this chapter

Assume \(c\) is a char variable. What value does \(c\) hold after each of the following statements executes? Statement \(\quad\) Contents of \(c\) \(c=\) toupper \(\left(' a^{\prime}\right)\) \(c=\) toupper \(\left(' B^{\prime}\right)\) \(c=\) tolower \(\left(' D^{\prime}\right)\) \(c=\) toupper \(\left(' e^{\prime}\right)\)

The __________ function copies, at most, \(n\) number of characters from one string to another.

T \(\mathrm{F}\) String-handling functions accept as arguments pointers to strings (array names or pointer variables), or literal strings.

Write a function that accepts a pointer to a C-string as its argument. The function should count the number of times the character 'w' occurs in the argument and return that number.

What header file must you include in a program using string functions such as strien and strcpy?
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