# KCS151/KCS251 PPS Lab Exercise Program: 01

## LAB Exercise Program: 01

#### KCS151P/KCS251P

##### LAB 3

Write a program to print the entire prime no between 1 and 300.

Write a program to print out all the Armstrong numbers between 100 and 500.

Write a program to draw the following figures:
3 2 1
2 1
1

*
**
***

Write a program to receive a five-digit no and display as like 24689:
2
4
6
8
9

##### LAB 4

Write a function that returns the sum of all the odd digits of a given positive no entered through the keyboard.

Write a program to print the area of the rectangle using function & return its value to the main function.

Write a program to calculate the factorial for the given number using a function.

Write a program to find the sum of the Fibonacci series using a function.

Write factorial function & use the function to find the sum of series S = 1! + 2! + … + n!

##### LAB 5

Write a program to find the factorial of the given number using recursion.

Write a program to find the sum of digits of a 5 digit number using recursion.

Write a program to calculate the GCD of given numbers using recursion.

Write a program to convert a decimal number into a binary number.

Write a program to convert a binary number into a decimal number.

##### LAB 6

Write a program to delete duplicate element in a list of 10 elements & display it on screen.

Write a program to merge two sorted arrays & no element is repeated during merging.

Write a program to evaluate the addition of diagonal elements of two square matrixes.

Write a program to find the transpose of a given matrix & check whether it is symmetric or not.

Write a program to print the multiplication of two N*N (Square) matrix.

##### LAB 7

Write a program in C to check whether the given string is a palindrome or not.

Write a program to sort the array of characters (String) in alphabetical order like STRING in GINRST.

Write a program to remove all the blank space from the string & print it, also count the no of characters.

Write a program to store the following string “zero”, “one”, … “five”.
Print the no in words, given in figure as 3205.

##### LAB 8

Write a program to compare two given dates. To store a date uses a structure that contains three members namely day, month, and year. If the dates are equal then display message equal otherwise unequal.

Define a structure that can describe a hotel. It should have the member that includes the name, address, grade, room charge, and the number of rooms.
Write a function to print out the hotel of given grade in order of room charges.

Define a structure called cricket with player name, team name, batting average, for 55 players & 5 teams. Print team-wise list contains names of players with their batting average.

##### LAB 9

Write a C program to copy & count the character content of one file, says a.txt to another file b.txt.

Write a program to take 10 integers from a file and write the square of these integers in another file.

Write a program to read numbers from a file and then write all ‘odd’ numbers to file ODD.txt & all ‘even’ to file EVEN.txt.

Write a program to print all the prime numbers, between 1 to 100 in file prime.txt.

Write the following C program using pointer:
a) To sort the list of numbers through the pointer.
b) To reverse the string through the pointer.

##### LAB 10

Write a program to find the largest no among 20 integers array using dynamic memory allocation.

Using Dynamic Memory Allocation, Write a program to find the transpose of the given matrix.

Write a program to find the factorial of the given number using the command line argument.

Write a program to find the sum of digits of a 5 digit number using the command line argument.

## 1. Write a program to calculate the area of a triangle using the formula at = √s(s-a)(s-b)(s-c).

				
/*
File: Prgrm01.c
Date: Jan 15, 2021
Description: Program to calculate the area of a triangle using formula at = &#x221A;s(s-a)(s-b)(s-c).
*/

#include <stdio.h>
#include <math.h>

int main (void)
{
float A, B, C;
float S;
float AT;

//Input length of Sides.
printf ("Input Side A: ");
scanf ("%f", &A);
printf ("Input Side B: ");
scanf ("%f", &B);
printf ("Input Side C: ");
scanf ("%f", &C);

//Calculate Semi-Perimeter of triangle (S) = (A+B+C)/2
S = (A + B + C) / 2;

//Calculate Area of triangle (AT) = &#x221A;s(s-a)(s-b)(s-c)
AT = sqrt (S * (S - A) * (S - B) * (S - C));

//Print result
printf ("Area of triangle: %.2f", AT);

return 0;
};



### Try it yourself

#### Sample Input and Output

Stdin Inputs:

20 30 45

Sample Result:

Input Side A: 20
Input Side B: 30
Input Side C: 45
Area of triangle: 239.06