#include <stdio.h>
 
int EsPrimo (int numero);
//int EsPrimo (int); // también se puede de esta forma
 
int main ( )
{
    int numero;
 
    printf("Dame un numero: ");
    scanf("%d", &numero);
 
    if (EsPrimo (numero) == 1)
        printf("Es un numero primo");
 
    else
        printf("No es un numero primo");
 
    setbuf (stdin, NULL);
    getchar ( );
    return 0;
 
}
 
int EsPrimo (int numero)
{
    int i, divisor, v;
 
    v = 1;
    i = (numero - 1);
 
    do
    {
        divisor = (numero % i);
        i--;
    } while ((i > 1) && (divisor != 0));
 
    if ( divisor == 0 )
        v = 0;
 
    return v;
}
 

#include <iostream>
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned &perimetro);
 
using namespace std;
 
int main ( )
{
    unsigned lado, base, p;
 
    cout << "Dime la base de tu rectangulo: ";
    cin >> base;
 
    cout << "Dame el lado de tu rectangulo: ";
    cin >> lado;
 
    cout << "Tu area es: " << calcular_area (base, lado, p) << " y su perimetro es: " << p << endl;
 
    cin.ignore ( );
    cin.get ();
 
    return 0;
}
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned &perimetro)
{
    unsigned area;
 
    area = (base * lado);
    perimetro = (lado * 2) + (base * 2);
 
    return area;
}
 

#include <iostream>
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned *perimetro);
 
using namespace std;
 
int main ( )
{
    unsigned lado, base, p;
 
    cout << "Dime la base de tu rectangulo: ";
    cin >> base;
 
    cout << "Dame el lado de tu rectangulo: ";
    cin >> lado;
 
    cout << "Tu area es: " << calcular_area (base, lado, &p) << " y su perimetro es: " << p << endl;
 
    cin.ignore ( );
    cin.get ();
    return 0;
}
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned *perimetro)
{
    unsigned area;
 
    area = (base * lado);
    *perimetro = (lado * 2) + (base * 2);
 
    return area;
}
 

#include <stdio.h>
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned *perimetro);
 
int main( )
{
    unsigned lado, base, p;
 
    printf ( "Dime la base de tu rectangulo: " );
    scanf ( "%u", &base );
 
    printf ( "Dame el lado de tu rectangulo: " );
    scanf ( "%u", &lado );
 
    printf ( "Tu area es: %u y su perimetro %u", calcular_area (base, lado, &p), p );
 
    setbuf (stdin, NULL)
    getchar ( );
    return 0;
}
 
unsigned calcular_area (unsigned base, unsigned lado, unsigned *perimetro)
{
    unsigned area;
 
    area = (base * lado);
    *perimetro = (lado * 2) + (base * 2);
 
    return area;
}