Exercises : Answer the following Question

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To help solidify your understanding of this hour's lesson, you are encouraged to answer the quiz questions and finish the exercises provided in the Workshop before you move to the next lesson. The answers and hints to the questions and exercises are given in Appendix E, "Answers to Quiz Questions and Exercises."
Quiz

    What are the values represented by the following enum names?

    enum months { Jan, Feb, Mar, Apr,
                  May, Jun, Jul, Aug,
                  Sep, Oct, Nov, Dec };

    What are the values represented by the following enum names?

    enum tag { name1,
               name2 = 10,
               name3,
               name4 };

    Which statements in the following are equivalent in the variable declaration?
        typedef long int BYTE32; BYTE32 x, y, z;
        typedef char *STRING[16]; STRING str1, str2, str3;
        long int x, y, z;
        char *str1[16], *str2[16], *str3[16];
    Can you pass some command-line arguments to a main() function that has the following definition?

    int main(void)
    {
       . . .
    }

Exercises

    Write a program to print out the values represented by the enumerated names declared in Quiz question 2.
    Given the following declarations:

    typedef char WORD;
    typedef int SHORT;
    typedef long LONG;
    typedef float FLOAT;
    typedef double DFLOAT;

    write a program to measure the sizes of the synonyms to the data types.

    Rewrite the program in Listing 18.4. This time, add integers starting at the value of MIN_NUM instead of the value of MAX_NUM.
    Write a program that accepts command-line arguments. If the number of command-line arguments, not including the name of the executable itself, is less than two, print out the usage format of the program and ask the user to reenter the command-line arguments. Otherwise, display all command-line arguments entered by the user.

Related Items

The main() Function, return statement in C Programming

The main() Function
In line 4 of Listing 2.1, you see this function:

The exit() Function in C Programming

The exit() Function

There is also a C library function, exit(), that can be used to cause a program to end. Because the exit() function is defined in a header file, stdlib.h, you have to include the header file at the beginning of your program।

The void Data Type in C Programming

The void Data Type

You may notice that the void word has been added into the C program in Listing 2.2. void is a keyword for a data type in C. When a void is placed prior to a function name, it indicates that the function does not return a value.

#include Directive and Header Files in C Programming

The #include Directive
Let's now move to line 2 in the C program of Listing 2.1:

Compiling and Linking C Programs

Compiling and Linking