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

Dr. A.P.J. Abdul Kalam Technical University, Lucknow

KCS151 / KCS251 Programming for Problem Solving - Using C Language

Lab Exercises

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

 Author: Aditya Saini

 Date: Jan 15, 2021

 Description: Program to calculate the area of a triangle using formula at = √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) = √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;

};

Output

Input Side A: 20

Input Side B: 30

Input Side C: 45

Area of triangle: 239.06