Hogyan vonjak gyököt C++ -ban?

#include <iostream>

#include <math.h>

using namespace std;

int Fo(int a,int b,int c) {

return 2*(a*c+b*c);

}

int Ft(int a,int b,int c){

return (2*(a*c+b*c))+(2*a*b);

}

int V(int a,int b,int c){

return a*b*c;

}

int d(int a,int b,int c);

{

return sqrt^((a*a)+(b*b)+(c*c));

}

int main()

{

int a,int b,int c;

cout<<"Add meg a teglatest hosszusagat!"<<endl;

cin>>a;

cout<<"Add meg a teglatest szelesseget!"<<endl;

cin>>b;

cout<<"Add meg a teglatest magassagat!"<<endl;

cin>>c;

cout<<"A teglatest Fo: "<<Fo(a,b,c)<<endl;

cout<<"A teglatest Ft: "<<Ft(a,b,c)<<endl;

cout<<"A teglatest V: "<<V (a,b,c)<<endl;

cout<<"A teglatest d: "<<d (a,b,c)<<endl;

return 0;

}