var n:integer - remingtoncatmonteria

PROGRAM OPERACIONES;
USES CRT;
VAR OP,N1,N2:INTEGER;
FUNCTION GETN1:INTEGER;
VAR N:INTEGER;
BEGIN
WRITELN('DIGITE NUMERO:');
READ(N);
GETN1:=N;
END;
FUNCTION GETN2:INTEGER;
VAR N:INTEGER;
BEGIN
WRITELN('DIGITE NUMERO:');
READ(N);
GETN2:=N;
END;
FUNCTION SUMA(X,Y:INTEGER):INTEGER;
BEGIN
SUMA:=X + Y;
END;
FUNCTION RESTA(X,Y:INTEGER):INTEGER;
BEGIN
RESTA:=X - Y;
END;
FUNCTION PRODUCTO(X,Y:INTEGER):INTEGER;
BEGIN
PRODUCTO:=X * Y;
END;
FUNCTION DIVISION(X,Y:INTEGER):REAL;
BEGIN
DIVISION:=X / Y;
END;
BEGIN {PRINCIPAL}
REPEAT
CLRSCR;
WRITELN('......MENU DE OPCIONES .....');
WRITELN('1. SUMA');
WRITELN('2. RESTA');
WRITELN('3. PRODUCTO');
WRITELN('4. DIVISION');
WRITELN('5. SALIR');
WRITELN;
WRITELN('ESCOJA UNA OPCION:');
READ(OP);
CASE OP OF
1: BEGIN
N1:=GETN1;
N2:=GETN2;
WRITELN('LA SUMA ES:',SUMA(N1,N2));
END;
2: BEGIN
N1:=GETN1;
N2:=GETN2;
WRITELN('LA RESTA ES:',RESTA(N1,N2));
END;
3: BEGIN
N1:=GETN1;
N2:=GETN2;
WRITELN('EL PRODUCTO ES:',PRODUCTO(N1,N2));
END;
4: BEGIN
N1:=GETN1;
N2:=GETN2;
WRITELN('LA DIVISION ES:',DIVISION(N1,N2):01:01);
END;
READKEY;
END;
UNTIL OP=5;
END.