IO 3

        Problem Description

Write a program to calculate the perimeter of a triangle using Heros formula

Use the  Following Formula:

s=(a+b+c)/2area=sqrt(s*(s-a)*(s-b)*(s-c))

Input and Output Format:

Refer sample input and output for formatting specification.

All float values are displayed correct to 2 decimal places.

All text in bold corresponds to input and the rest corresponds to output.

CODING ARENA::

#include <stdio.h>

#include<math.h>

int main()

{

  float a,b,c,s,area;

  scanf("%f%f%f",&a,&b,&c);

  s=(a+b+c)/2;

  area=sqrt(s*(s-a)*(s-b)*(s-c));

  printf("perimeter of triangle is=%f",area);

  return 0;

} 

    Test Case 1

Input (stdin)

2.0 3.0 4.0

Expected Output

perimeter of triangle is=2.904737

Test Case 2

Input (stdin)

3.4 5.6 7.9

Expected Output

perimeter of triangle is=8.178576