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)/2
  
  area = 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.
  
  

• 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

• Program

• #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;
  }