Month: May 2012

Aptitude Questions and answers with explanation

Posted on by Sandeepa Nadahalli
C Aptitude 11
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

 
Predict the output or error(s) for the following:

C aptitude 11.1

   main()
{
    int i=1;
    while (i<=5)
    {
       printf("%d",i);
       if (i>2)
              goto here;
       i++;
    }
}
fun()
{
   here:
     printf("PP");
}

Answer: Compiler error: Undefined label ‘here’ in function main

Explanation: Labels have functions scope, in other words The scope of the labels is limited to functions . The label ‘here’ is available in function fun() Hence it is not visible in function main.

C aptitude 11.2

   main()
{
   static char names[5][20]={"pascal","ada","cobol","fortran","perl"};
    int i;
    char *t;
    t=names[3];
    names[3]=names[4];
    names[4]=t; 
    for (i=0;i<=4;i++)
            printf("%s",names[i]);
}

Answer: Compiler error: Lvalue required in function main

Explanation:Array names are pointer constants. So it cannot be modified.

C aptitude 11.3

    void main()
{
            int i=5;
            printf("%d",i++ + ++i);
}

Answer: Output Cannot be predicted exactly.

Explanation: Side effects are involved in the evaluation of i 

Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

To browse more C Programs visit this link
(c) www.c-program-example.com

C Aptitude Questions and answers with explanation

Posted on by Sandeepa Nadahalli
C Aptitude 10
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

Predict the output or error(s) for the following:

C aptitude 10.1

  void main()
{
 char far *farther,*farthest;

 printf("%d..%d",sizeof(farther),sizeof(farthest));

 }

Answer: 4..2

Explanation: the second pointer is of char type and not a far pointer

C aptitude 10.2

    main()
{
 int i=400,j=300;
 printf("%d..%d");
}

Answer: 400..300

Explanation:printf takes the values of the first two assignments of the program. Any number of printf’s may be given. All of them take only the first two values. If more number of assignments given in the program, then printf will take garbage values.

C aptitude 10.3

    main()
{
 char *p;
 p="Hello";
 printf("%cn",*&*p);
}

Answer: H

Explanation: * is a dereference operator & is a reference operator. They can be applied any number of times provided it is meaningful. Here p points to the first character in the string “Hello”. *p dereferences it and so its value is H. Again & references it to an address and * dereferences it to the value H. 

Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

To browse more C Programs visit this link
(c) www.c-program-example.com

C Aptitude Questions and answers with explanation

Posted on by Sandeepa Nadahalli
C Aptitude 9
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

Predict the output or error(s) for the following:

C aptitude 9.1

  main()
{
printf("%p",main);
}


Answer: Some address will be printed.

Explanation: Function names are just addresses (just like array names are addresses). main() is also a function. So the address of function main will be printed. %p in printf specifies that the argument is an address. They are printed as hexadecimal numbers.

C aptitude 9.2

 main()
{
clrscr();
}
clrscr();

Answer: No output/error

Explanation: The first clrscr() occurs inside a function. So it becomes a function call. In the second clrscr(); is a function declaration (because it is not inside any function).

C aptitude 9.3

   enum colors {BLACK,BLUE,GREEN}
 main()
{

 printf("%d..%d..%d",BLACK,BLUE,GREEN);

 return(1);
}

Answer: 0..1..2

Explanation: enum assigns numbers starting from 0, if not explicitly defined.

Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 

You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it

(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!

To browse more C Programs visit this link
(c) www.c-program-example.com

K & R C Chapter 7 Exercise Solutions.

Posted on by Sandeepa Nadahalli
We have already provided solutions to all the exercises in the book “C Programming Language (2nd Edition)“ popularly known as K & R C book.

In this blog post I will give links to all the exercises from Chapter 7 of the book for easy reference.

Chapter 7: Input and Output

  1. Exercise 7-1. Write a program that converts upper case to lower or lower case to upper, depending on the name it is invoked with, as found in argv[0].
    Solution to Exercise 7-1.

  2. Exercise 7-2.Write a program that will print arbitrary input in a sensible way. As a minimum, it should print non-graphic characters in octal or hexadecimal according to local custom, and break long text lines.
    Solution to Exercise 7-2.

  3. Exercise 7-3.Revise minprintf to handle more of the facilities of printf .
    Solution to Exercise 7-3.

  4. Exercise 7-4. Write a private version of scanf analogous to minprintf from the previous section.
    Solution to Exercise 7-4.

  5. Exercise 7-5. Rewrite the postfix calculator of Chapter 4 to use scanf and/or sscanf to do the input and number conversion.
    Solution to Exercise 7-5.

  6. Exercise 7-6. Write a program to compare two files, printing the first line where they differ.
    Solution to Exercise 7-6.
  7. Exercise 7-7. Modify the pattern finding program of Chapter 5 to take its input from a set of named files or, if no files are named as arguments, from the standard input. Should the file name be printed when a matching line is found?
    Solution to Exercise 7-7.

  8. Exercise 7-8. Write a program to print a set of files, starting each new one on a new page, with a title and a running page count for each file.
    Solution to Exercise 7-8.

  9. Exercise 7-9. Functions like isupper can be implemented to save space or to save time. Explore both possibilities.
    Solution to Exercise 7-9.
You can purchase the book from here or here.

To get regular updates on new C programs, you can Follow @c_program

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Like to get updates right inside your feed reader? Grab our feed!

To browse more C Programs visit this link
(c) www.c-program-example.com

C Aptitude Questions and answers with explanation

Posted on by Sandeepa Nadahalli
C Aptitude 8
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.

Predict the output or error(s) for the following:

C aptitude 8.1

  main()
{
char *p="hai friends",*p1;
p1=p;
while(*p!='