WAP to input 3 sides of triangle and check whether it is valid or not

#include<conio.h>

#include<stdio.h>

#include<math.h>

int main()

{

float a,b,c,s,A;

printf("\n enter the value of the sides of the triangle:");

scanf("%f%f%f",&a,&b,&c);

if( (a+b>c) && (b+c>a) && (a+c>b) )

{

s=(a+b+c)/2;

A=sqrt(s*(s-a)*(s-b)*(s-c));

printf("\n the triangle is valid");

printf("\n the area of the triangle is:%f",A);

}

else

printf("\n the triangle is not valid");

getch();

return 0;

}