⯈Algorithm and its Characteristics
⯈Elementary Problems
- Addition of two numbers
- Calculate area and circumference of circle
- Calculate area of triangle
- Calculate simple interest
- Calculate slope and distance between two points
- Convert length in feet to inches
- Weighted score in exam
- Convert temperature in degree Celsius to Fahrenheit
- Swap two numbers
- Swap two numbers without using extra variable
- Overview of C Programming Language
- Getting started with C Programming Language
- Keywords
- Identifiers
- Constants
- Operators
- Expression Evaluation
- Mathematical expression to C equivalent expressions
- Datatypes
- Variables
- Integer representation in C
- Character representation in C
- Type conversion in C
- sizeof operator
- Comments
- Mathematical Functions
- input output statements
- width specifiers in C
- structure of a C program
- header files
- Compilation process of a C program
- Types of initializations.
⯈Basic C Programs
- C program to add two numbers
- C program to find area and circumference of circle
- C program to swap two numbers
- C program to swap two numbers without using extra variable
- C program to swap two numbers using bitwise XOR
- C program to convert temperature in Celsius to Fahrenheit
- C program to calculate gross salary of an employee
- C program to count number of digits in a positive integer
- C program to count number of digits in binary representation
- C program to count number of digits in base ‘K’
- C program to convert kilometer to meter, feet, inches and centimeters
- C program to find first and last digit of a number
- C program to find minimum number of currency denominations
- C program to convert cartesian coordinates to polar coordinates
- C program to find distance between two places on earth in nautical miles
- C program to find slope and distance between two points
- C program to add 1 to the number using ‘+’ operator
- C program to find maximum of two numbers using ternary operator
- C program to find maximum of three numbers using ternary operator
- C program to find kth bit of a number
- C program to find last four bits of a byte
Algorithm and Flowchart to calculate area of triangle
This problem can be solved either by considering the input as three sides of the triangle, or the input as base and height of the triangle.
Let us solve this by considering three sides of a triangle.
Input: Given three sides of the triangle. Let the three sides of triangle be ‘a’, ‘b’ and ‘c’. Whenever we write algorithm or program, we always start from reading the input.
Reading input: Read three sides of triangle as ‘a’, b’ and ‘c’.
Formula: area = √( s *(s-a) * (s-b) * (s-c) ), where s is the semi perimeter.
s = (a+b+c)/2
After we calculate the area, we display area.
The algorithm for area of triangle is as follows:
Algorithm:
Name of Algorithm: To compute area of triangle given three sides.
Step 1: Start
Step 2: Read three sides as ‘a’, ‘b’ and ‘c’
Step 3: s = (a+b+c)/2 [Computing semi perimeter]
Step 4: area = √(s *(s-a) * (s-b) * (s-c))
Step 5: Display area
Step 6: stop.
Note: All that we calculate may/may not be in the output.
Here we have calculated semi perimeter (s) but didn’t output it.
Flowchart:
Tracing:
In step two we read the three sides of triangle,
Let a = 3, b = 4 and c = 5
In step three, we compute s = (3+4+5)/2 = 6
In step 4, we compute area as,
area = √(s *(s-a) * (s-b) * (s-c))
= √(6*(6-3)*(6-4)*(6-5)
= 6 sq units