#include <iostream.h>
  
// Fundamental idea of Euclid's algorithm (one of the oldest known algorithms)
  
// gcd(a,0) = a
  
// gcd(a,b) = gcd(b,a%b)
  
int gcd (int a, int b)
  
{
    
int temp;
    
while (b != 0)
    
{
      
temp = a % b;
      
a = b;
      
b = temp;
    
}
    
return(a);
  
}
  
int main ()
  
{
    
int x, y;
    
cout << "Enter two natural numbers: ";
    
cin >> x >> y;
    
cout << "gcd(" << x << ", " << y << ") = " << gcd(x,y) << endl;
    
return(0);
  
}

  
# include <iostream.h>
  
# include <conio.h>
  
# include <math.h>
  
void main ()
  
{
    
clrscr();
    
int a,b=0,sum=0;
    
long int n;
    
cout<<"Enter the NO. : ";
    
cin>>n;
    
for(;n>0;)
    
//counts the digits
    
{
      
a=n%10;
      
n=n/10;
      
b++;
    
}
    
for(;n>0;)
     {
      
a=n%10;
      
sum=sum+pow(a,b);
      
n=n/10;
    
}
    
if(sum==n)
    
{
      
cout<<"IT IS AN ARMSTRONG NUMBER...";
      
getch();
    
}
    
else
    
{
      
cout<<"IT IS NOT AN ARMSTRONG NUMBER...";
      
getch();
    
}
  
}

  
#include <iostream.h>
  
#include <conio.h>
  
void main()
  
{
    
clrscr();
    
int choice;
    
float ctemp,ftemp;
    
cout << "1.Celsius to Fahrenheit" << endl;
    
cout << "2.Fahrenheit to Celsius" << endl;
    
cout << "Choose between 1 & 2 : " << endl;
    
cin>>choice;
    
if (choice==1)
    
{
      
cout << "Enter the temperature in Celsius : " << endl;
      
cin>>ctemp;
      
ftemp=(1.8*ctemp)+32;
      
cout << "Temperature in Fahrenheit = " << ftemp << endl;
    
}
    
else
    
{
      
cout << "Enter the temperature in Fahrenheit : " << endl;
      
cin>>ftemp;
      
ctemp=(ftemp-32)/1.8;
      
cout << "Temperature in Celsius = " << ctemp << endl;
    
}
    
getch();
  
}

Scaricare iostream.h e conio.h per usare codice   
#include<iostream.h>
  
#include<conio.h>
  
class complex
  
{
    
private:
      
float real,img;
    
public:
      
void assign(float x,float y)
    
{
      
real=x;
      
img=y;
    
}
    
void print()
    
{
    
if(img>=0)
      
cout<< real<<"+"<< img<<"i";
    
else
      
cout<< real<< img<<"i";
    
getch();
    
}
  
};
  
void add( float a,float b,float c, float d)
  
{
    
float e,f;complex g;
    
e=a+c;
    
f=b+d;
    
g.assign(e,f);
     g.print();
  
}
  
void sub( float a,float b,float c, float d)
  
{
    
float e,f;complex g;
    
e=a-c;
    
f=b-d;
    
g.assign(e,f);
     g.print();
  
}
  
void mul( float a,float b,float c, float d)
  
{
    
float e,f; complex g;
    
e=a*c-b*d;
    
f=b*c+a*d;
    
g.assign(e,f);
     g.print();
  
}
  
void main()
  
{
    
float a,b,c,d;
    
complex x,y,z;
    
clrscr();
    
cout<<" for complex 1:";
    
cout<<"real part:";
    
cin>>a;
    
cout<<"imaginary part:";
    
cin>>b;
    
cout<<" for complex 2:";
    
cout<<"real part:";
    
cin>>c;
    
cout<<"imaginary part:";
    
cin>>d;
    
x.assign(a,b);
    
y.assign(c,d);
    
cout<<"***original data:***\n";
    
cout<<"Complex 1:\n";x.print();
    
cout<<"\n Complex 2:\n";y.print();
    
cout<<"\n***\n";
    
cout<<"\n Addition:\n";add(a,b,c,d);
    
cout<<"\n Subtraction:\n";sub(a,b,c,d);
    
cout<<"\n Multipication:\n";mul(a,b,c,d);
  
}

Aggiungeremo a breve semplici codici per sviluppare piccole app

Uscita nuovo gs4
Sarà nuovo o un evoluzione dell s3 ?