Convert string LowerCase

Q. Write a string to accept string through keyboard and convert it Lower Case letter.

Ans.

/*program to convert a string in lower case letter*/

#include<stdio.h>

#include<string.h>

int main()

{

Number pattern

Q. Write a C program to display the following pattern:

 1

 2   3

 4   5    6

 7   8    9    10

11  12   13    14  15

Ans.

/*program to design the above pattern*/

#include<stdio.h>

#include<conio.h>

void main()

{

goto statement

The goto statement is used to alter the normal sequence of program instructions by transferring the control to some other portion of the program.

The syntax is as follows:

goto label;

Here, label is an identifier that is used to label the statement to which control will be transferred. The targeted statement must be preceded by the unique label followed by colon.

label: statement;

It is recommended that as possible as skip the goto statement because when we use goto then we can never be sure how we got to a certain point in our code. They obscure the flow of control.

Note:- goto can never be used to jump into the loop from outside and it should be preferably used for forward jump.

Let us consider a program to illustrate goto and label statement:

Selection sorting

Q. Write a C program to to sort a list of elements using selection sort method.

Ans.

/*program to demonstration of selection method*/

#include<stdio.h>

#include<conio.h>

#define SIZE 10

int main()

{

Bubble sorting

Q. Write a program to accept 10 numbers from user and sort list using Bubble sorting method.

Ans.

Logic of bubble sorting as follows:

In bubble sorting steps:

1. Start from left hand side

2. Compare first two numbers

3. If first_number > second_number than swap both number position. And if first_number < second_number than these compare next two numbers i.e. second_number and third_number.

4. Step-3 process repeat until there are no more numbers left to compared.

5. Bubble sorting completed.

An example on bubble sort.

To understand logic of Bubble Sorting, lets take random numbers:

6  3  7  1  4  5  2

First iteration

6  3  7  1  4  5  2

3  6  7  1  4  5  2

3  6  7  1  4  5  2

3  6  1  7  4  5  2

3  6  1  4  7  5  2

3  6  1  4  5  7  2

3  6  1  4  5  2  7

Second iteration

3  6  1  4  5  2  7

3  6  1  4  5  2  7

3  1  6  4  5  2  7

3  1  4  6  5  2  7

3  1  4  5  6  2  7

3  1  4  5  2  6  7

Palindrome function

Q. Write a C program to check whether a string is palindrome or not using function.

Ans.

/*Program to check whether a string is palindrome or not using function*/

#include<stdio.h>

#include<conio.h>

char string_palin(char str[]);

int main()

{

String Triangle

Q. Write a program to display the string INDIA in the following fashion:

I

IN

IND

INDI

INDIA

INDIA

INDI

IND

IN

I

Ans.

/*program to display the string as given fashion*/

#include<stdio.h>

#include<conio.h>

int main()

{