11.11: Exercises

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Below are some quiz questions and project suggestions based on this chapter.

Quiz Questions

Below are some quiz questions.

What is the declaration for a character variable, msg, to contain the string “Hello World!”?
Given the following conditional expressions,
```
"D" > "c"
"100" < "20"
"Da" > "cA"
"20" < "10"
"d" > "C"
"20" < "100"
"ABBC" <= "ABCD"
```
state which will evaluate to true and which to false.

Given the following Fortran statements,

character(len=6) :: str1="abcdef", str2="ABCDEF"
character(len=6) :: str3="123456", str4="78910"
character(len=12) :: astr1, astr2, astr3, astr4
astr1 = str1(1:3)
astr2 = str3(4:6)
astr3 = str3 // str4
astr4 = str2(4:6) // str3(1:3) // str1(2:3)

provide the resulting strings (astr1, astr2, astr3, and astr4).

How can the integer value (based on the ASCII table) of a character be obtained?
How can integer value be converted to a character (based on the ASCII table)?

Suggested Projects

Below are some suggested projects.

Type in the case conversion example program, compile, and execute the program. Test the program on a series of different input values and verify that the output is correct for those input values.
Update the case conversion example program to convert any upper-case characters to lower-case characters. Test the program on a series of different input values and verify that the output is correct for those input values.
Write a program to read a string and count the vowels (“a”, “e”, “i”, “o”, and “u”). The program should provide a count for each vowel and a total count of vowels. The program should ensure that the vowels are counted for both upper and lower-case. Test the program on a series of different input values and verify that the output is correct for those input values.
Write a program to read 5 strings (≤ 80 characters each) and display the strings in alphabetical order. Test the program with a variety of different input strings, including digits, upper-case, and lower-case characters. Test the program on a series of different input values and verify that the output is correct for those input values.