функции

#include<iostream>
#include<cmath>
using namespace std;
 float Func1(float x1, float x2, float y1, float y2)
{float d=sqrt(pow(x2-x1,2)+pow(y2-y1,2));
 return d;}
 float Func2(float a, float b, float c)
{float p=a+b+c;
 return p;}
int main()
{float x1,x2, x3, y1,y2,y3;
float a,b,c,p;
cin>>x1>>x2>>x3>>y1>>y2>>y3;
a=Func1(x1,x2,y1,y2);
b=Func1(x1,x3,y1,y3);
c=Func1(x3,x2,y3,y2);
p=Func2(a,b,c);
cout<<"perimetr="<<p<<endl;
system("pause");
return 0;}