Написать программу/функцию. Объявление переменных

#include<stdio.h>
#include<conio.h>
void main()
{
float a,b,c;  
clrscr();
printf("\n vvedite a: "); scanf("%f",a);
printf("\n vvedite b: "); scanf("%f",b);
printf("\n vvedite c: "); scanf("%f",c);
printf("\n\n a=%5.3f\t b=%5.3f\t c=%5.3f\t",a,b,c);
getch();
}

#include<iostream.h>
#include<conio.h>
void main()
{
float x,y;
clrscr();
cout<<"\n vvedite x: "; 
cin>>x;
y= -2,7*х*3 + 0,23*х*2 - 1,4.
cout<<"\n\n function y="<<y;
getch();
}

#include<stdio.h>
#include<conio.h>
void main()
{
float a,b,c;  
clrscr();
printf("\n vvedite a: "); scanf("%f",&a);
printf("\n vvedite b: "); scanf("%f",&b);
printf("\n vvedite c: "); scanf("%f",&c);
printf("\n\n a=%5.3f\t b=%5.3f\t c=%5.3f\t",a,b,c);
getch();
}

#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
float x,y;
clrscr();
cout<<"\n vvedite x: "; 
cin>>x;
y= -2,7*pow(x,3) + 0,23*pow(x,2) - 1,4.
cout<<"\n\n function y="<<y;
getch();
}

#include <iostream.h>
#include <conio.h>
#include <math.h>
void main()
{
float R,h,v,s;
cout<<"\n vvedite R cilindrа: ";
cin>>R;
cout<<"\n vvedite h cilindra: ";
cin>>h;
v=M_PI*pow(R,2)*h;
s=2*M_PI*R*(h+R);
cout<<"\n\n plohad poverhnosti cilindra :"<<s<<"\n Obiem cilindra: "<<v<<endl;
 
getch();
}

#include <iostream.h>
#include <conio.h>
#include <math.h>
void main()
{
float R,h,v,s;
cout<<"\n vvedite R kruga: ";
cin>>R;
s=M_PI*pow(R,2);
cout<<"\n\n plohad Kruga :"<<s<<endl;
 
getch();
}

#include <iostream.h>
#include <conio.h>
#include <math.h>
void main()
{
float s,t,c1,c2;
cout<<"\n vvedite ceny  tetradi: ";
cin>>c1;
cout<<"\n vvedite ceny oblogki: ";
cin>>c2;
cout<<"\n  vvedite kolicestvo  tetradei: ";
cin>>t;
s=(t*c1)+(t*c2);
cout<<"\n Ctoimost pokypki: "<<s;
 
getch();
}

#include <iostream.h>
#include <conio.h>
#include <math.h>
void main()
{
int c1,s;  clrscr();
cout<<"\n vvedite dliny 1 ctorini  kvadrata v cm: ";
cin>>c1;
s=pow(c1,2);
cout<<"\n plohad kvadrata ravna: "<<s;
 
getch();
}

#include <iostream.h>
#include <conio.h>
#include <math.h>
float znac(float a, float b);
void main()
{
float p,A,B;  clrscr();
cout<<"\n vvedite A: ";
cin>>A;
cout<<"\n vvedite B: ";
cin>>B;
p=znac(A,B);
cout<<"\n znacenie "<<A<<"*"<<B<<"="<<p;
 
getch();
}
 
float znac(float a, float b)
{return a*b;}

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <math.h>
float znac(float a, float b);
void main()
{
float p,A,B;  clrscr();
cout<<"\n vvedite A: ";
cin>>A;
cout<<"\n vvedite B: ";
cin>>B;
p=znac(A,B);
printf("\n znacenie %.3f^%.3f=%.3f",A,B,p);
 
getch();
}
 
float znac(float a, float b)
{return pow(a,b);}

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <math.h>
float znac(float a, float b,float c);
void main()
{
float p,A,B,C;  clrscr();
cout<<"\n vvedite A: ";
cin>>A;
cout<<"\n vvedite B: ";
cin>>B;
cout<<"\n vvedite C: ";
cin>>C;
p=znac(A,B,C);
printf("\n znacenie %.3f*%.3f*%.3f=%.3f",A,B,C,p);
 
getch();
}
 
float znac(float a, float b,float c)
{return a*b*c;}

#include <iostream.h>
#include <conio.h>
void main()
{
int x,s;  clrscr();
cout<<"\n vvedite dliny 1 ctorini  kvadrata v cm: ";
cin>>x;
s=x*x;
cout<<"\n plohad kvadrata ravna: "<<s;
getch();
}