С++ ЕНФ / LABA 5 / 5LB2

#include <iostream.h>
#include <conio.h>
#include <math.h>
#include <stdlib.h>
void vvod(float x1,float y1,float z1,float x2,float y2,float z2)
{cout<<"vv. x1 \n";cin>>x1;cout<<"vv. y1 \n";cin>>y1;cout<<"vv. z1 \n";cin>>z1;
 cout<<"vv. x2 \n";cin>>x2;cout<<"vv. y2 \n";cin>>y2;cout<<"vv. z2 \n";cin>>z2;
};

void zadacha()
{clrscr();
 cout<<"proga, kotoraya provodit razlichnie operacii nad vectorami \n\n";
 getch();};

void vihod()
{;}

void summa(float x1,float y1,float z1,float x2,float y2,float z2)
{cout<<sqrt(pow(x1+x2,2)+pow(y1+y2,2)+pow(z1+z2,2));};

void raznost(float x1,float y1,float z1,float x2,float y2,float z2)
{cout<<sqrt(pow(x1-x2,2)+pow(y1-y2,2)+pow(z1-z2,2))<<endl;};

void scalyar(float x1,float y1,float z1,float x2,float y2,float z2)
{;};

void vector(float x1,float y1,float z1,float x2,float y2,float z2)
{;};

void main()
{clrscr();float x1=0,y1=0,z1=0,x2=0,y2=0,z2=0;
 //void (*ptr)(float,float,float,float,float,float)[7];//={zadacha,vvod,summa,raznost,scalyar,vector,vihod};
 //ptr[0]=zadacha;
 textbackground(7);
 textcolor(12);
 cout<<"proga, kotoraya provodit razlichnie operacii nad vectorami \n\n";
 cout<<"";
/*do
 {for(int i=0;i<=6;i++)
  {cout<<
  };
 }
while (p!=ptr[6]);*/
 /*switch()
  {case -1:
   case
   case
   default:cout<<"naprav. vv.,povtorite";
  };*/



 getch();
}