Program To Find Area of Traingle Using Function In C++

#include<iostream.h>

#include<conio.h>

#include<math.h>

void sum(int x,int y,int z);

main()

{

clrscr();

float a,b,c,m,n,area;

cout<<"enter numbers=";

cin>>a>>b>>c;

sum(a,b,c);

getch();

}

void sum(int x,int y,int z)

{

float m,n;

m=(a,b,c/2);

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

cout<<area;

}