The document contains code for several programs: 1. A billing program that allows adding items to a grid and calculates totals. 2. A calculator program with buttons for numbers and operations. 3. A program that calculates percentages of different products in a total. 4. A program that draws circles in an area and changes the radius on button clicks. 5. A screensaver program that draws random shapes on a timer in an area. 6. A digital clock program.

2. FACTURA
CODIGO FUENTE
PUBLIC I AS Integer
PUBLIC m AS Integer
PUBLIC R AS Integer
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
TextBox1.SetFocus
GridView1.Columns.Count = 5
GridView1.Rows.Count = 10
GridView1.Columns[0].Width = 50
GridView1.Columns[1].Width = 200
GridView1.Columns[2].Width = 80
GridView1.Columns[3].Width = 80
GridView1.Columns[4].Width = 80
GridView1[0, 0].Text = "NUM"
GridView1[0, 1].Text = "DETALLE"
GridView1[0, 2].Text = "PRECIO U/"
GridView1[0, 3].Text = "CANT"
GridView1[0, 4].Text = "TOTAL"
R=0
I=0

3. ' GridView1[0, 3].Text =
END
PUBLIC SUB TextBox3_KeyPress()
IF Key.Code = 65293 THEN
IF TextBox3.Text = "" THEN
Message("INGRESE UN VALOR")
TextBox3.SetFocus
ELSE
I=I+1
R=R+1
TextBox1.Text = I
GridView1[r, 0].Text = Val(TextBox8.Text)
GridView1[r, 1].Text = (TextBox1.Text)
GridView1[r, 2].Text = TextBox2.Text
GridView1[r, 3].Text = TextBox3.Text
'precio
TextBox9.Text = Val(TextBox2.Text) * (TextBox3.Text)
GridView1[r, 4].Text = Val(TextBox9.Text)
m = m + Val(TextBox9.Text)
TextBox1.text = ""
TextBox2.text = ""
TextBox3.text = ""
TextBox1.SetFocus
ENDIF
ENDIF
END
PUBLIC SUB Button2_Click()
TextBox4.Text = m
TextBox5.Text = (m * 7) / 100
TextBox6.Text = ((((textBox4.Text) - (TextBox5.text)) * 12) / 100)
TextBox7.Text = (textBox4.Text) - (TextBox5.Text) + (TextBox6.Text)
END
PUBLIC SUB Button1_Click()
TextBox1.text = ""
TextBox2.text = ""
TextBox3.text = ""
TextBox1.SetFocus
GridView1.Clear
END
PUBLIC SUB TextBox2_KeyPress()

4. IF Key.Code = 65293 THEN
IF TextBox2.Text = "" THEN
Message("INGRESE UN VALOR")
TextBox2.SetFocus
ELSE
TextBox3.SetFocus
ENDIF
ENDIF
END
PUBLIC SUB TextBox1_KeyPress()
IF Key.Code = 65293 THEN
IF TextBox2.Text = "" THEN
Message("INGRESE UN VALOR")
TextBox2.SetFocus
ELSE
TextBox3.SetFocus
ENDIF
ENDIF
END

5. 2.- CALCULADORA
' Gambas class file
PUBLIC BAN AS Integer
PUBLIC OP1 AS Float
PUBLIC OP2 AS Float
PUBLIC SUB Button1_Click()
TextBox1.Text = TextBox1.Text & "1"
END
PUBLIC SUB Button2_Click(
TextBox1.Text = TextBox1.Text & "2"
END
PUBLIC SUB Button3_Click()
TextBox1.Text = TextBox1.Text & "3"
END
PUBLIC SUB Button6_Click()
TextBox1.Text = TextBox1.Text & "4"
END
PUBLIC SUB Button7_Click()

6. TextBox1.Text = TextBox1.Text & "5"
END
PUBLIC SUB Button8_Click()
TextBox1.Text = TextBox1.Text & "6"
END
PUBLIC SUB Button11_Click()
TextBox1.Text = TextBox1.Text & "7"
END
PUBLIC SUB Button9_Click()
TextBox1.Text = TextBox1.Text & "8"
END
PUBLIC SUB Button10_Click()
TextBox1.Text = TextBox1.Text & "9"
END
PUBLIC SUB Button4_Click()
TextBox1.Text = TextBox1.Text & "0"
END
PUBLIC SUB Button5_Click()
TextBox1.Text = TextBox1.Text & "00"
END
PUBLIC SUB Button18_Click()
FMain.CLOSE
END
PUBLIC SUB Button17_Click()
TextBox1.Text = TextBox1.Text & "."
END
PUBLIC SUB Button16_Click()
BAN = 1
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear

7. END
PUBLIC SUB Button19_Click()
TextBox1.Text = ""
END
PUBLIC SUB Button15_Click()
BAN = 2
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button13_Click()
BAN = 3
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button12_Click()
BAN = 4
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button14_Click()
IF TextBox1.Text <> 0 THEN
OP2 = TextBox1.Text
ELSE
OP2 = 0
ENDIF
TextBox1.Text = OPERACION(OP1, OP2, BAN)
END

8. PUBLIC FUNCTION OPERACION(V1 AS Float, V2 AS Float, OPER AS Float) AS Float
DIM RE AS Float
DIM X, Y, Z, X1, Y1, Z1, X2, Y2, Z2 AS Integer
DIM valor, i AS Integer
DIM cadena, cadena2 AS String
DIM XX, MEA AS String
SELECT CASE OPER
CASE 1
RE = V1 + V2
Z2 = 1
CASE 2
RE = V1 - V2
Z2 = 1
CASE 3
RE = V1 * V2
Z2 = 1
CASE 4
RE = V1 / V2
Z2 = 1
CASE 5
RE = (V1 * V2) / 100
Z2 = 1
CASE 6
RE = V1 ^ V2
Z2 = 1
CASE 7
RE = V1 ^ 2
Z2 = 1
CASE 8
RE = V1 ^ 3
Z2 = 1
CASE 9
RE = 1 / V1
Z2 = 1
END SELECT
IF Z2 = 1
RETURN RE
ELSE
RETURN Y1
ENDIF
END
PUBLIC SUB Button20_Click()
BAN = 5

9. IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button21_Click()
BAN = 6
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Clear
END
PUBLIC SUB Button22_Click()
BAN = 7
IF TextBox1.Text <> 0 THEN
OP1 = TextBox1.Text
ELSE
OP1 = 0
ENDIF
TextBox1.Text = OP1
END
PUBLIC SUB Button23_Click()
DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
valor = TextBox1.Text
WHILE valor > 0
x1 = valor MOD 2
x2 = Int(valor / 2)
cadena = cadena & Str(x1)
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP -1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END

10. PUBLIC SUB Button25_Click()
'Calculo a octal de un número decimal
DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
valor = TextBox1.Text
WHILE valor > 0
x1 = valor MOD 16
x2 = Int(valor / 16)
IF x1 = 10 THEN
cadena = cadena & "A"
ELSE
IF x1 = 11 THEN
cadena = cadena & "B"
ELSE
IF x1 = 12 THEN
cadena = cadena & "C"
ELSE
IF x1 = 13 THEN
cadena = cadena & "D"
ELSE
IF x1 = 14 THEN
cadena = cadena & "E"
ELSE
IF x1 = 15 THEN
cadena = cadena & "F"
ELSE
cadena = cadena & Str(x1)
ENDIF
ENDIF
ENDIF
ENDIF
ENDIF
ENDIF
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP -1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END
PUBLIC SUB Button24_Click()
'Calculo a octal de un número decimal

11. DIM valor, x1, x2, i AS Integer
DIM cadena, cadena2 AS String
valor = TextBox1.Text
WHILE valor > 0
x1 = valor MOD 8
x2 = Int(valor / 8)
cadena = cadena & Str(x1)
valor = x2
WEND
FOR i = Len(cadena) TO 1 STEP -1
cadena2 = cadena2 & (Mid(cadena, i, 1))
NEXT
TextBox1.Text = cadena2
END
PUBLIC SUB Button29_Click()
TextBox1.Text = TextBox1.Text ^ 3
END
PUBLIC SUB Button27_Click()
TextBox1.Text = 1 / TextBox1.Text
END
PUBLIC SUB Button26_Click()
' DIM N AS Float
IF TextBox1.Text = "" THEN
Message("INGRESE DATO")
' ELSE
' IF RadioButton1.Value = TRUE THEN
' N = Str(Sin(Val(TextBox1.Text)))
' TextBox1.Text = N
' RadioButton2.Value = FALSE
ELSE
' IF RadioButton2.Value = TRUE THEN
TextBox1.Text = Sin(Pi * (Val(TextBox1.Text)) / 180)
' ENDIF
' ENDIF
ENDIF
END
PUBLIC SUB Button31_Click()
' DIM N AS Float
' N = Cos(TextBox1.Text)
' TextBox1.Text = N

12. IF TextBox1.Text = "" THEN
Message("INGRESE DATO")
ELSE
TextBox1.Text = Cos(Pi * (Val(TextBox1.Text)) / 180)
ENDIF
END
PUBLIC SUB Button30_Click()
IF TextBox1.Text = "" THEN
Message("INGRESE DATO")
ELSE
TextBox1.Text = Tan(Pi * (Val(TextBox1.Text)) / 180)
ENDIF
END
PUBLIC SUB Button28_Click()
DIM FAC, N AS Float
N = TextBox1.Text
FAC = 1
WHILE (N <> 0)
FAC = FAC * N
N=N-1
TextBox1.Text = FAC
WEND
END

13. 3.- PORCENTAJE DE UN PRODUCTO
PUBLIC SUB Main()
DIM A AS Integer
DIM B AS Integer
DIM C AS Integer
DIM T AS Integer
DIM PM AS Float
DIM PC AS Float
DIM PO AS Float
A = 300
B = 400
C = 800
T=A+B+C
PM = (300 * 100) / T
PC = (400 * 100) / T
PO = (800 * 100) / T
PRINT "EL TOTAL ES...."
PRINT T
PRINT "EL PORCENTAJE DE MAIZ ES...."
PRINT PM & "%"
PRINT "EL PORCENTAJE DE CAFE ES...."
PRINT PC & "%"
PRINT "EL PORCENTAJE DE CACAO ES...."
PRINT PO & "%"

14. END
4.- REALIZAR UN CÍRCULO
PUBLIC r AS Integer
PUBLIC pox AS Integer
PUBLIC poy AS Integer
PUBLIC SUB _new()
END
PUBLIC SUB Form_Open()
r = 30
END
PUBLIC SUB Button1_Click()
area1.Clear
pox = area1.Height / 2
poy = area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB(200, 190, 50)
Draw.FillStyle = Fill.BackDiagonal
Draw.FillStyle = Fill.Dense37
Draw.Circle(pox, poy, r)
r = r + 10

15. Draw.End
END
PUBLIC SUB Button3_Click()
ME.Close
END
PUBLIC SUB Button2_Click()
area1.Clear
pox = area1.Height / 2
poy = area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB(200, 190, 50)
Draw.FillStyle = Fill.Vertical
Draw.FillStyle = Fill.Cross
Draw.Circle(pox, poy, r)
r = r - 10
Draw.End
END
PUBLIC SUB Button4_Click()
DIM n1, n2, n3 AS Integer
RANDOMIZE
n1 = Int(Rnd() * 1000)
' TextBox1.Text = n1
area1.Clear
pox = area1.Height / 2
poy = area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB(200, 190, 50)
Draw.FillStyle = Fill.CrossDiagonal
Draw.FillStyle = Fill.Cross
Draw.Circle(pox, poy, n1)
Draw.Ellipse(pox, poy, n1, n1)
r = r - 10
n2 = Int(Rnd() * 10)
Draw.Ellipse(pox, poy, n2, n2)
Draw.Line(pox, poy, n2, n2)
Draw.Rect(pox, poy, n2)
n3 = Int(Rnd() * 10)
END

17. 5.- PROTECTOR DE PANTALLA
' Gambas class file
PUBLIC SUB Form_Open()
Timer1.Enabled = TRUE
Timer2.Enabled = TRUE
Timer3.Enabled = TRUE
Timer4.Enabled = TRUE
Timer5.Enabled = TRUE
END
PUBLIC SUB Timer1_Timer()
DIM c1, c2, c, posy, posx AS Integer
C1 = Int(Rnd() * 700)
C2 = Int(Rnd() * 700)
C = Int(Rnd() * 20)
posy = Area1.Height / 2
posx = Area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB((160 + c1), (2 + c2), (c1 + C2))
' coge los colores que se designen
Draw.FillStyle = Fill.Solid
Draw.Circle(posy, C2, C)
Draw.End
END

18. PUBLIC SUB Button1_Click()
ME.Close
END
PUBLIC SUB Timer2_Timer()
DIM c1, c2, c AS Integer
C1 = Int(Rnd() * 1000)
C2 = Int(Rnd() * 1000)
C = Int(Rnd() * 400)
' posy = Area1.Height / 2
' posx = Area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB((160 + c1), (2 + c2), (c1 + C2))
' coge los colores que se designen
Draw.FillStyle = Fill.Diagonal
Draw.Ellipse(C1, C2, C, c)
Draw.End
END
PUBLIC SUB Timer3_Timer()
DIM c1, c2, c AS Integer
C1 = Int(Rnd() * 600)
C2 = Int(Rnd() * 600)
C = Int(Rnd() * 40)
' posy = Area1.Height / 2
' posx = Area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB((300 + c1), (7 + c2), (c1 + C2))
' coge los colores que se designen
Draw.FillStyle = Fill.Dense94
Draw.Line(C1, C2, C, c)
Draw.End
END
PUBLIC SUB Timer4_Timer()
DIM c1, c2, c, r AS Integer
C1 = Int(Rnd() * 600)
C2 = Int(Rnd() * 600)
C = Int(Rnd() * 40)
' posy = Area1.Height / 2
' posx = Area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB((200 + c1), (5 + c2), (c1 + C2))

19. ' coge los colores que se designen
Draw.FillStyle = Fill.Dense94
Draw.Rect(C1, C2, c, c)
Draw.End
END
PUBLIC SUB Timer5_Timer()
DIM c1, c2, c, r AS Integer
IF Timer5.Delay > 10 THEN
Area1.Clear
TextBox2.Text = ""
TextBox2.Text = Timer
ELSE
C1 = Int(Rnd() * 600)
C2 = Int(Rnd() * 600)
C = Int(Rnd() * 40)
' posy = Area1.Height / 2
' posx = Area1.Width / 2
Draw.Begin(area1)
Draw.FillColor = Color.RGB((200 + c1), (5 + c2), (c1 + C2))
' coge los colores que se designen
Draw.FillStyle = Fill.Dense94
'Draw.Polygon(C1, C2)
Draw.End
TextBox2.Text = Timer
ENDIF
END

20. 6.- RELOJ DIGITAL
PUBLIC SUB Form_Open()
timer1.Enabled = TRUE
END
PUBLIC SUB Timer1_Timer()
timer1.Delay = 1000
TextLabel1.Text = Time(Hour(Now), Minute(Now), Second(Now))
END
PUBLIC SUB Button1_Click()
Message.Info("Es facil programar en Gambas")
ME.CLOSE
END
PUBLIC SUB Button2_Click()
Message.Delete("Ejemplo de Reloj Digital ")
END
PUBLIC SUB Form_Activate()
TextBox1.text = TextLabel1.Text = Time(Hour(Now))
END

22. 7.- VERIFICADOR DE # DE CEDULA
PUBLIC SUB Main()
DIM NUM_CED, NOMBRE AS String
DIM A, B, C, D, E, F, G, H, I, J, K, L AS Integer
PRINT "INGRESE SU NOMBRE"
INPUT NOMBRE
PRINT "INGRESE NUMERO DE CEDULA"
INPUT NUM_CED
FOR A = 1 TO 9 STEP 1
B = Str(Mid(NUM_CED, A, 1))
C = A MOD 2
IF C = 0 THEN
H=H+B
ELSE
G=B*2
IF G > 9 THEN
C = G MOD 10
D = Int(G / 10)
E=C+D
ELSE

23. E=G
ENDIF
F=F+E
ENDIF
NEXT
I=F+H
J = I MOD 10
K = 10 - J
L = Mid(NUM_CED, 1, 9)
PRINT "EL NUMERO DE SU CEDULA ES...." & Str(L) & "-" & Str(K)
END
8.- UTILIZACION DE FUNCIONES
' Gambas module file
PRIVATE heroe AS superheroe
PRIVATE heroe1 AS superheroe
PRIVATE heroe2 AS superheroe
'atributos
PUBLIC SUB Main()
' DIM heroe AS superheroe
' DIM heroe1 AS superheroe
heroe = NEW superheroe

24. heroe1 = NEW superheroe
heroe2 = NEW superheroe
heroe.nombre = "AQUILES MEJIA"
heroe.actor = "DRAGON BALL Z "
heroe.habilidad = "JENQUI DAMA "
heroe.imprime()
heroe1.nombre = "EDUARDO MEJIA "
heroe1.actor = "SUPERMAN "
heroe1.habilidad = "BOLAR POR LOS AIRES"
heroe1.imprime()
WITH heroe2
.nombre = "Zorro"
.actor = "Antonio Bandera"
.habilidad = "Peliar Con La Espada"
.imprime()
END WITH
END
PUBLIC nombre AS String
PUBLIC actor AS String
PUBLIC habilidad AS String

25. PUBLIC FUNCTION imprime()
'PRINT "Hola mi nombre es: " & Str(nombre) & " Mi personaje favorito es: " & Str(actor) & " Y su habilidad
es: " & Str(habilidad)
PRINT "Hola mi nombre es: " & nombre & " Mi personaje favorito es: " & actor & " Y su habilidad es: " &
habilidad
END
9.- CONVERTIDOR DE NUMEROS A LETRAS
' Gambas class file
PUBLIC FUNCTION EnLetras(numero AS String) AS String
DIM b, paso AS Integer
DIM expresion, entero, deci, flag AS String
flag = "N"
FOR paso = 1 TO Len(numero)
IF Mid(numero, paso, 1) = "." THEN
flag = "S"
ELSE
IF flag = "N" THEN
entero = entero & Mid(numero, paso, 1) 'Extae la parte entera del numero
ELSE
deci = deci & Mid(numero, paso, 1) 'Extrae la parte decimal del numero
END IF
END IF
NEXT
' paso
IF Len(deci) = 1 THEN

26. deci = deci & "0"
END IF
flag = "N"
IF Val(numero) >= -999999999 AND Val(numero) <= 999999999 THEN 'si el numero esta dentro de 0 a
999.999.999
FOR paso = Len(entero) TO 1 STEP -1
b = Len(entero) - (paso - 1)
SELECT CASE paso
CASE 3, 6, 9
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF Mid(entero, b + 1, 1) = "0" AND Mid(entero, b + 2, 1) = "0" THEN
expresion = expresion & "Cien "
ELSE
expresion = expresion & "Ciento "
END IF
CASE "2"
expresion = expresion & "Doscientos "
CASE "3"
expresion = expresion & "Trescientos "
CASE "4"
expresion = expresion & "Cuatrocientos "
CASE "5"
expresion = expresion & "Quinientos "
CASE "6"
expresion = expresion & "Seiscientos "
CASE "7"
expresion = expresion & "Setecientos "
CASE "8"
expresion = expresion & "Ochocientos "
CASE "9"
expresion = expresion & "Novecientos "
END SELECT
CASE 2, 5, 8
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF Mid(entero, b + 1, 1) = "0" THEN
flag = "S"
expresion = expresion & "Diez "
END IF
IF Mid(entero, b + 1, 1) = "1" THEN
flag = "S"
expresion = expresion & "Once "

27. END IF
IF Mid(entero, b + 1, 1) = "2" THEN
flag = "S"
expresion = expresion & "Doce "
END IF
IF Mid(entero, b + 1, 1) = "3" THEN
flag = "S"
expresion = expresion & "Trece "
END IF
IF Mid(entero, b + 1, 1) = "4" THEN
flag = "S"
expresion = expresion & "Catorce "
END IF
IF Mid(entero, b + 1, 1) = "5" THEN
flag = "S"
expresion = expresion & "Quince "
END IF
IF Mid(entero, b + 1, 1) > "5" THEN
flag = "N"
expresion = expresion & "Dieci"
END IF
CASE "2"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Veinte "
flag = "S"
ELSE
expresion = expresion & "Veinti"
flag = "N"
END IF
CASE "3"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Treinta "
flag = "S"
ELSE
expresion = expresion & "Treinta y "
flag = "N"
END IF
CASE "4"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Cuarenta "
flag = "S"

28. ELSE
expresion = expresion & "Cuarenta y "
flag = "N"
END IF
CASE "5"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Cincuenta "
flag = "S"
ELSE
expresion = expresion & "Cincuenta y "
flag = "N"
END IF
CASE "6"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Sesenta "
flag = "S"
ELSE
expresion = expresion & "Sesenta y "
flag = "N"
END IF
CASE "7"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Setenta "
flag = "S"
ELSE
expresion = expresion & "Setenta y "
flag = "N"
END IF
CASE "8"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Ochenta "
flag = "S"
ELSE
expresion = expresion & "Ochenta y "
flag = "N"
END IF
CASE "9"
IF Mid(entero, b + 1, 1) = "0" THEN
expresion = expresion & "Noventa "

29. flag = "S"
ELSE
expresion = expresion & "Noventa y "
flag = "N"
END IF
END SELECT
CASE 1, 4, 7
SELECT CASE Mid(entero, b, 1)
CASE "1"
IF flag = "N" THEN
IF paso = 1 THEN
expresion = expresion & "Uno "
ELSE
expresion = expresion & "Un "
END IF
END IF
CASE "2"
IF flag = "N" THEN
expresion = expresion & "Dos "
END IF
CASE "3"
IF flag = "N" THEN
expresion = expresion & "Tres "
END IF
CASE "4"
IF flag = "N" THEN
expresion = expresion & "Cuatro "
END IF
CASE "5"
IF flag = "N" THEN
expresion = expresion & "Cinco "
END IF
CASE "6"
IF flag = "N" THEN
expresion = expresion & "Seis "
END IF
CASE "7"
IF flag = "N" THEN
expresion = expresion & "Siete "
END IF
CASE "8"
IF flag = "N" THEN

30. expresion = expresion & "Ocho "
END IF
CASE "9"
IF flag = "N" THEN
expresion = expresion & "Nueve "
END IF
END SELECT
END SELECT
IF paso = 4 THEN
IF Mid(entero, 6, 1) <> "0" OR Mid(entero, 5, 1) <> "0" OR Mid(entero, 4, 1) <> "0" OR (Mid(entero,
6, 1) = "0" AND Mid(entero, 5, 1) = "0" AND Mid(entero, 4, 1) = "0" AND Len(entero) <= 6) THEN
expresion = expresion & "mil "
END IF
END IF
IF paso = 7 THEN
IF Len(entero) = 7 AND Mid(entero, 1, 1) = "1" THEN
expresion = expresion & "Millón "
ELSE
expresion = expresion & "Millones "
END IF
END IF
NEXT
' paso
IF deci <> "" THEN
IF Mid(entero, 1, 1) = "-" THEN 'si el numero es negativo
expresion = "menos " & expresion & "con " & deci & "/100"
ELSE
expresion = expresion & "con " & deci & "/100"
END IF
ELSE
IF Mid(entero, 1, 1) = "-" THEN 'si el numero es negativo
expresion = "menos " & expresion
ELSE
expresion = expresion
END IF
END IF
ELSE 'si el numero a convertir esta fuera del rango superior e inferior
expresion = ""
END IF
TextBox2.Text = expresion
END FUNCTION
PUBLIC SUB Button1_Click()

31. ME.Close
END
PUBLIC SUB TextBox1_KeyPress()
IF Key.Code = 65293 THEN
EnLetras(TextBox1.Text)
ENDIF
END
10.- ENCONTRAR EL MAYOR, MENOR, INTERMEDIO DE UN
NÚMERO
' Gambas module file
'entre tres numeros distintos mayor medio menor igual
PUBLIC SUB Main()
DIM a, b, c AS Integer
a = 15
b = 100
c = 22
IF a > b AND a > c THEN
PRINT "El mayor es...:" & Str(a)
IF b > c THEN

32. PRINT "El intermedio es...:" & Str(b)
PRINT "El menor es...:" & Str(c)
ELSE
PRINT "El intermedio es...:" & Str(c)
PRINT "El menor es...:" & Str(b)
ENDIF
ELSE
IF b > c THEN
PRINT "El mayor es...:" & Str(b)
IF a > c THEN
PRINT "El intermedio es...:" & Str(a)
PRINT "El menor es...:" & Str(c)
ELSE
PRINT "El intermedio es...:" & Str(c)
PRINT "El menor es...:" & Str(a)
ENDIF
ELSE
PRINT "El mayor es...:" & Str(c)
IF a > b THEN
PRINT "El intermedio es...:" & Str(a)
PRINT "El menor es...:" & Str(b)
ELSE
PRINT "El intermedio es...:" & Str(b)
PRINT "El menor es...:" & Str(a)
ENDIF
ENDIF
ENDIF
END

33. 11.- CRONOMETRO
Gambas class file
PUBLIC SUB Timer1_Timer()
SEG.Text = Val(SEG.Text) + 1
IF SEG.Text = 60 THEN
MIN.Text = Val(MIN.Text) + 1
SEG.Text = 0
ENDIF
IF MIN.Text = 60 THEN
HOR.Text = Val(HOR.Text) + 1
MIN.Text = 0
ENDIF
IF HOR.Text = 24 THEN
HOR.Text = 0
ENDIF

34. END
PUBLIC SUB Button1_Click()
IF Button1.Text = "INICIAR" THEN
Timer1.Enabled = TRUE
Button1.Caption = "PARAR"
ELSE
IF Button1.Text = "PARAR" THEN
Timer1.Enabled = FALSE
Button1.Caption = "INICIAR"
ENDIF
ENDIF
END
PUBLIC SUB Button2_Click()
Me.close
END