To classify the triangle as equilateral, isosceles and scalene

C Program to classify the triangle as equilateral, isosceles and scalene.

C Program

#include<stdio.h>
#include<math.h>
#include<conio.h> 
void main() 
{
	int a, b, c;
 
	float s, area;
	clrscr();
	printf("Enter the values of the sides of the triangle: \n");
	scanf("%d %d %d", &a, &b, &c);
	if ((a + b > c && a + c > b && b + c > a) && (a > 0 && b > 0 && c > 0))	
	{
		s = (a + b + c) / 2.0;
		area = sqrt((s * (s - a) * (s - b) * (s - c)));
		if (a == b && b == c)
		{
			printf("Equilateral Triangle. \n");
			printf("Area of Equilateral Triangle is: %f", area);
		}
		else if (a == b || b == c || a == c)
		{
 
			printf("Isosceles Triangle. \n");
 
			printf("Area of an Isosceles Triangle: %f", area);
		}
		else
		{
			printf("Scalene Triangle. \n");
			printf("Area of Scalene Triangle: %f", area);
 
		}
 
	}
 
	else 
	{
		printf("Triangle formation not possible");
	}
	getch();
}

Output