#include <stdio.h>
int opc,i;
int bande=1;
main()
{
do{
printf ("\n\t\t\t PROGRAMA PARA IMPRIMIR TRIANGULOS");
printf ("\n\t\t\t\tSELECCIONE LA OPCION");
printf ("\n\n1.Triangulo Norte");
printf ("\n2.Triangulo Sur");
printf ("\n3.Rombo");
printf ("\n4.Salir");
scanf (" %d",&opc);
switch (opc)
{
case 1:
{
printf ("\t\t\t\t ");
for (i=3;i<=3;i++)
printf (" PROGRA");

printf ("\n\t\t\t");
for (i=2;i<=4;i++)
printf ("  PROGRA");

printf ("\n\t\t");
for (i=1;i<=5;i++)
printf ("  PROGRA");

printf ("\n\t");
for (i=0;i<=6;i++)
printf ("  PROGRA");

printf ("\n");
for (i=0;i<=8;i++)
printf ("  PROGRA");

}
break ;


case 2:
{
printf ("\n");
for (i=0;i<=8;i++)
printf ("  PROGRA");

printf ("\n\t");
for (i=0;i<=6;i++)
printf ("  PROGRA");

printf ("\n\t\t");
for (i=1;i<=5;i++)
printf ("  PROGRA");

printf ("\n\t\t\t");
for (i=2;i<=4;i++)
printf ("  PROGRA");

printf ("\t\t\t\t");
for (i=3;i<=3;i++)
printf ("\t\t\t\t ");
printf (" PROGRA");
}
break ;

case 3:
{
printf ("\t\t\t\t ");
for (i=3;i<=3;i++)
printf (" PROGRA");

printf ("\n\t\t\t");
for (i=2;i<=4;i++)
printf ("  PROGRA");

printf ("\n\t\t");
for (i=1;i<=5;i++)
printf ("  PROGRA");

printf ("\n\t");
for (i=0;i<=6;i++)
printf ("  PROGRA");

printf ("\n");
for (i=0;i<=8;i++)
printf ("  PROGRA");

printf ("\n");
for (i=0;i<=8;i++)
printf ("  PROGRA");

printf ("\n\t");
for (i=0;i<=6;i++)
printf ("  PROGRA");

printf ("\n\t\t");
for (i=1;i<=5;i++)
printf ("  PROGRA");

printf ("\n\t\t\t");
for (i=2;i<=4;i++)
printf ("  PROGRA");

printf ("\t\t\t\t");
for (i=3;i<=3;i++)
printf ("\t\t\t\t ");
printf (" PROGRA");

case 4:
printf ("\n\t EL PROGRAMA ESTA TERMINANDO");
break;
}
}
printf ("\n\nSi desea continuar presiones 1/salir presione 0");
scanf (" %d",&bande);
}while(bande==1 && bande<=5);
return 0;
}