what is wrong with this problem,i need some help.
#include <iostream>
#include "conio.h"
#include "math.h"
void main()
{
float a,b,c,d,p,s;
cout<<"Scrieti a = ";
cin>>a;
cout<<"Scrieti b = ";
cin>>b;
cout<<"Scrieti c = ";
cin>>c;
p=(a+b+c)/2;
s=sqrt(p*(p-a)*(p-b)*(p-c));
printf("Aria e f",d);
_getch();
}