С++ ЕНФ / LABA 5 / MENUV3

# include <iomanip.h>
# include <iostream.h>
# include <stdlib.h>
# include <conio.h>
float zadacha (float &x1, float &y1, float &z1, float &x2, float &y2, float &z2,float &p)
//Zadat' koordinatu vektorov
{float a,b,c,d,e,f;
cout<<"vv. koordinati 1 vegtora \n";
cout<<setw(5)<<"vvedite x "<<endl;
cin>>a;x1=a;
cout<<setw(5)<<"vvedite y "<<endl;
cin>>b;y1=b;
cout<<setw(5)<<"vvedite z "<<endl;
cin>>c;z1=c;
cout<<setw(5)<<"vvedite x"<<endl;
cin>>d;x2=d;
cout<<setw(5)<<"vvedite y"<<endl;
cin>>e;y2=e;
cout<<setw(5)<<"vvedite z"<<endl;
cin>>f;z2=f;
p=1;
return 0;
}

float sumiraz (float &x1, float &y1, float &z1, float &x2, float &y2, float &z2,float&p) //Vuchislenie sumu i raznosti 2-x vektorov
{if (p==0) {cout<<"vvedite dannie \n";}
else
{
float x3,y3,z3,x4,y4,z4;
clrscr();
x3=x1+x2;y3=y1+y2;z3=z1+z2;
cout<<"summa ravna ("<<x3<<","<<y3<<","<<z3<<") \n";
x4=x1-x2;y4=y1-y2; z4=z1-z2;
cout<<"raznost' ravna ("<<x4<<","<<y4<<","<<z4<<") \n";
};
return 0;
}

float skalpr (float &x1, float &y1, float &z1, float &x2, float &y2, float &z2,float &p) //Skaliarnoe proizvedenie
{if (p==0) {cout<<"vvedite dannie \n";}
else
{
float sp=x1*x2+y1*y2+z1*z2;
cout<<endl<<setw(4)<<"Skaliarnoe proizvedenie = "<<sp<<endl;
};
return 0;
}

float vekpr(float &x1, float &y1, float &z1, float &x2, float &y2, float &z2,float &p) //Skaliarnoe proizvedenie
{if (p==0) {cout<<"vvedite dannie \n";}
else
{float x3=y1*z2-y2*z1;
float y3=x1*z2-x2*z1;
float z3=x1*y2-x2*y1;
cout<<setw(4)<<"vektornoe proizvedenie vectorov = ("<<x3<<","<<y3<<","<<z3<<") \n";
};
return 0;
}

void main ()
{float (*v[4])(float &,float &,float &,float &,float &,float &,float &)={zadacha,sumiraz,skalpr,vekpr};
char m[20];
float z1,z2,x1,x2,y1,y2,p=0;
int z,i;
for (;;)
{clrscr();
cout<<endl<<setw(15)<<"funkcii raboti s dvumya 3x-mernumi vektorami \n"
<<"1, - vvesti koordinati vektorov \n"
<<"2, - summa i raznost' vektorov \n"
<<"3, - skaliarnoe proizvedenie vektorov \n"
<<"4, - vektornoe proizvedenie vektorov \n"
<<"5, - vihod iz programmu \n";
for(;;)
{cin>>m;
z = atoi(m);
if (z>=0 && z<6)
{break;}
else {cout<<"Vvedite vernoe znachenie N ot 1 do 5!";}
}
if (z==5)
{break;}
else
{for (i=0;i<=4;i++)
{if (z==i+1)
{(*v[i])(x1,x2,y1,y2,z1,z2,p);break;}
}
}
getch();
}
}