1. //PROGRMA PARA CALCULAR LOS NUMEROS PARES<br />#include <iostream.h><br />#include <conio.h><br />void main()<br />{<br />int n1;<br />n1=2;<br />do<br />{<br />cout<<n1;<br />cout<<quot;
es un numero parquot;
;<br />cout<<quot;
quot;
;<br />n1=n1+2;<br />} while (n1<=20);<br />getch();<br />}<br />//PROGRMA PARA CALCULAR LOS NUMEROS IMPARES<br />#include <iostream.h><br />#include <conio.h><br />void main()<br />{<br />int n1;<br />n1=1;<br />do<br />{<br />cout<<n1;<br />cout<<quot;
es un numero imparquot;
;<br />cout<<quot;
quot;
;<br />n1=n1+2;<br />} while (n1<=20);<br />getch();<br />}<br />