i have to do the following thing.
Make a program in Pascal that after has read a text with a list of nums., it will return the numb. of the nums that appear less than one times in the text.
The text that will be read from the program should be like that.
In the first line there are two nums. seperated by a space, n and m. N is the number of nums that exist, like if the text contains the numbers 1,2,3,4, n is 4 (1..n). M is how many lines follow. Every line has a couple of nums, a,b, (1=b) a and b are separated by a space.
The file that the program will make will have written on it a num., that says how many nyms are appeared less than two tims in the text.
All the nums. are Integer.
0=
I have finished it, but the problem is that at the new text that p has to be written, p is always 1, For me the problem is at the place that i have the bold letters, it might be because i in count and i in a arrays are different, how can i correct this???
Thank you in advance.
program MyProgr;
var
F: text;
t:Textfile;
a,count:array of Integer;
b:Integer;
i,int:Integer;
countnums:Integer;
n,m:String;
lin,nums:Integer;
Small,Big:Integer;
procedure DoWhatEver(S: string);
begin
val(s,int);
Write(s,' ');
for i:=Small to Big do
if (a[i]=int) then
count[i]:=count[i]+1;
end;
procedure FilltheArray;
begin
for i:=Small to Big do
a[i]:=i+1 ;
end;
procedure ProcessString;
var
Strng, S: string;
Last, P: integer;
begin
readln(F,Strng);
Last:=0;
while Last<length(Strng) do
begin
P:=Last+1;
while (P<=length(Strng)) and (Strng[P]<>' ') do
inc(P);
S:=copy(Strng,Last+1,(P-Last-1));
DoWhatEver(S);
Last:=P;
end
end;
procedure ProcessStringA;
var
Strng: string;
Last, P: integer;
begin
readln(F,Strng);
Last:=0;
while Last<length(Strng) do
begin
P:=Last+1;
while (P<=length(Strng)) and (Strng[P]<>' ') do
inc(P);
n:=copy(Strng,Last+1,(P-Last-1));
Val(n,nums);
Last:=P;
end
end;
procedure ProcessStringB;
var
Strng: string;
Last, P: integer;
begin
readln(F,Strng);
Last:=0;
while Last<length(Strng) do
begin
P:=Last+1;
while (P<=length(Strng)) and (Strng[P]<>' ') do
inc(P);
m:=copy(Strng,Last+1,(P-Last-1));
Val(m,lin);
Last:=P;
end
end;
begin
assign(F,'myfile.txt');
reset(F);
ProcessStringA;
Writeln(nums);
ProcessStringB;
Writeln(lin);
setlength(a,nums);
Small:=Low(a);
Big:=High(a);
for i:= Small to big do
count[i]:=0;
FillTheArray;
while not eof(F) do
ProcessString;
for i:=Small to Big do
begin
if count[i]=2 then
countnums:=countnums+1;
end;
Close(f);
Assign(t,'fileout.txt');
Rewrite(t);
Writeln(t,countnums);
close(t);
end.
Related
sorting system and the main problem starts from the "Until" function. I would like to hear someones opinion about what I did wrong, and if there is an easier solution, I will appreciate if u told me about it.
The idea of the problem is: you have n number of people, and u need do introduce each one from the keyboard. Then, I need to sort them alphabeticlly
uses crt;
type Data = record
day : 1..31;
month : 1..12;
year : integer;
end;
Persoana = record
Name : string;
BirthDate : Data;
end;
ListaPersoane = array [1..50] of Persoana;
var x : ListaPersoane;
n:1..50;
i,z,j,l,a,v:integer;
y, k : longint;
aux : string;
begin
writeln('Program created on: 13/10/2020;');
writeln('give the number of people (max. 50):');
readln(n);
for i:=1 to n do begin
ClrScr;
writeln('Insert the name of person ', i, ': '); readln(x[i].Name);
writeln('Insert the date o birth:'); writeln('day:'); readln(x[i].BirthDate.day);
writeln('month:'); readln(x[i].BirthDate.month);
writeln('year:'); readln(x[i].BirthDate.year);
ClrScr;
end;
writeln('_______________________');
for i:=1 to n do begin
writeln(i, ') ', x[i].Name, ' ', x[i].BirthDate.day, '/', x[i].BirthDate.month, '/', x[i].BirthDate.year, ';');
writeln('_______________________');
end;
writeln();
repeat
k:=0;
for i:=1 to n do begin
j:=1;
repeat
Inc(j);
until (x[i].Name[j]>x[i].Name[j]) or (x[i].Name[j]<x[i].Name[j]);
if(x[i].Name[j]>x[i+1].Name[j]) then begin
aux:=x[i].Name;
x[i].Name:=x[i+1].Name;
x[i+1].Name:=aux;
z:=x[i].BirthDate.day;
x[i].BirthDate.day:=x[i+1].BirthDate.day;
x[i+1].BirthDate.day:=z;
l:=x[i].BirthDate.month;
x[i].BirthDate.month:=x[i+1].BirthDate.month;
x[i+1].BirthDate.month:=l;
a:=x[i].BirthDate.year;
x[i].BirthDate.year:=x[i+1].BirthDate.year;
x[i+1].BirthDate.year:=a;
Inc(k);
end;
end;
until (k=0);
writeln('_______________________');
for i:=1 to n do begin
writeln(i, ') ', x[i].Name, ' ', x[i].BirthDate.day, '/', x[i].BirthDate.month, '/', x[i].BirthDate.year, ';');
writeln('_______________________');
end;
writeln();
end.
I would expect that PascalABC can compare two strings and return which one is "smaller" or "bigger", without looping through the characters.
But to draw your attention to (at least) three issues in your sorting code, consider this code of yours:
j := 1;
repeat
Inc(j);
until (x[i].Name[j] > x[i].Name[j]) or (x[i].Name[j] < x[i].Name[j]);
Issue 1:
You initialize j := 1 before the loop. Then before you use j to index a character, you increment it. Thus you never attempt to compare the first character.
Issue 2:
Your repeat loop doesn't take into consideration that names have a limited, and often different length.
Issue 3:
Will either of these conditions, on the until row, ever be true:
(x[i].Name[j] > x[i].Name[j])
or this:
(x[i].Name[j] < x[i].Name[j])
In the subsequent code you correctly compare a character in x[i] with x[i+1]
I leave the correction of these errors for you, yourself, to correct. Consult with your tutor if needed.
You have a repeat .. until which terminates when k=0. You start with k assigned 0, then never change k. Perhaps your repeat is terminating because you don’t change k in the loop.
I currently have set of words inputted inside my MemoBox.
Question is how do I check the specific letters on each lines of the TMemobox Lines property. If letter is not similar on the word being specified then it should be wrong and not be counted in and if answer correct how to let the word appear on the wordlabel?
Also how to limit the guess-label property into only inputting 5 letters?
Currently making a hang-man game :)
Set of Words here
I currently have this code:
{***************** CheckALetter ***************}
procedure TForm1.CheckLetter(ch:char);
var
i:integer;
s:string;
goodguess:boolean;
begin
goodguess:=false;
if not (ch in GuessedLetters)
then
begin
GuessedLetters:=GuessedLetters+[ch];
guessesLabel.caption:=guesseslabel.caption+ch+',';
s:=Wordlabel.caption;
for i:=1 to length(TheWord) do {see if the letter is in the word}
begin
if ch=Theword[i] then
begin
s[2*i-1]:=ch; {fill in the letter in display}
goodguess:=true;
end;
end;
wordlabel.caption:=s;
{if not goodguess then drawAPiece(clred);}
If pos('_',WordLabel.caption)=0 then {all underscores replaced by letters}
showmessage('A reprieve!')
else {If piececount=Hangmanlist.count}
begin
showmessage('Oh, oh Goodbye!'+#13 +'(The word was '+theword+')');
{deadlbl.visible:=true;}
end;
end
else messagebeep(mb_IconExclamation);
end;
//On key presss
procedure TForm1.guess_typeKeyPress(Sender: TObject; var Key: Char);
begin
key:=upcase(key);
guess_type.text:='';
If not (key in ['A'..'Z']) then
begin
key:=#00;
messagebeep(mb_iconexclamation);
end
else CheckLetter(key);
end;
end.
not sure where the TMemo fits in. The TMemo.Lines is just a normal TStringList, you can make a fo
for i:=1 to MyMemo.Lines.Count do
s := MyMemo.Lines[i-1];
// Do somenthing with s..
I started learning Pascal :) and I was interested on making a kind of Euromillion... However, I don't know how to forbid the same numbers or stars...
I thought this (below) would solve it... But it didn't... Help?
Program euromillion;
var num: array [1..5] of integer;
Procedure numbers;
var i, j: integer;
Begin
write ('Digite o número 1: ');
readln (num[1]);
for i:=2 to 5 do
for j:=1 to (i-1) do
Begin
repeat
write ('Digite o número ', i, ': ');
readln (num[i]);
until (num[i]>=1) and (num[i]<=50) and ((num[i]=num[j])=false);
End;
End;
Begin
numbers;
readln();
End.
Thanks guys :)
Although it is tempting to try and write a single block of code, as you have, it is better not to. Instead, a better way to write a program like this
is to think about splitting the task up into a number of procedures or functions
each of which only does a single part of the task.
One way to look at your task is to split it up into sub-tasks, as follows:
You prompt the user to enter a series of numbers
Once each number is entered, you check whether it is already in the array
If it isn't, you enter it in the array, otherwise prompt the user for another number
Once the array is filled, you output the numbers in the array
So, a key thing is that it would be helpful to have a function that checks whether
a new number is already in the array and returns True if it is and False otherwise. How to do that is the answer to your question.
You need to be careful about this because if you use the array a second time in the
program, you need to avoid comparing the new number with the array contents from
the previous time. I deliberately have not solved that problem in the example code below, to leave it as an exercise for the reader. Hint: One way would be to write a procedure which "clears" the array before each use of it, e.g. by filling it with numbers which are not valid lottery numbers, like negative numbers or zero. Another way would be to define a record which includes the NumberArray and a Count field which records how many numbers have been entered so far: this would avoid comparing the new number to all the elements in the
array and allow you to re-use the array by resetting the Count field to zero before calling ReadNumbers.
program LotteryNumbers;
uses crt;
type
TNumberArray = array[1..5] of Integer;
var
Numbers : TNumberArray;
Number : Integer;
function IsInArray(Number : Integer; Numbers : TNumberArray) : Boolean;
var
i : Integer;
begin
Result := False;
for i:= Low(Numbers) to High(Numbers) do begin
if Numbers[i] = Number then begin
Result := True;
break;
end;
end
end;
procedure ReadNumbers(var Numbers : TNumberArray);
var
i : Integer;
NewNumber : Integer;
OK : Boolean;
begin
// Note: This function needs to have a check added to it that the number
// the user enters is a valid lottery number, in other words that the
// number is between 1 and the highest ball number in the lottery
for i := Low(Numbers) to High(Numbers) do begin
repeat
OK := False;
writeln('enter a number');
ReadLn(NewNumber);
OK := not IsInArray(NewNumber, Numbers);
if not OK then
writeln('Sorry, you''ve already chosen ', NewNumber);
until OK;
Numbers[i] := NewNumber;
end;
end;
procedure ListNumbers(Numbers : TNumberArray);
var
i : Integer;
begin
for i := Low(Numbers) to High(Numbers) do
writeln(Numbers[i]);
end;
begin
ReadNumbers(Numbers);
ListNumbers(Numbers);
writeln('press any key');
readkey;
end.
I was trying to use same printing procedure for two types of arrays(1st arry length was 10, 2nd array length was 15).
I could not find any solution over internet. Did any one have any solution for this problem.
this is the Two arrays
program pp1;
const
m=10;
n=15;
type
matrix1=array[1..m] of integer;
matrix2=array[1..n] of integer;
var
m1:matrix1;
m2:matrix2;
this is the method which it tried. in method 'x' mens the length of the array.
procedure writeMatrix(var data: array of integer ;x:integer);
var
j:integer;
begin
for j:=1 to x do
begin
write(data[j]:3);
end;
end;
my main method
begin
writeMatrix(m1,10);
writeMatrix(m2,10);
end.
How can i use the same this writeMatrix method to print both of the arrays.. Is there any stranded way to do it.
As I said in my comment before, your implementation is fine, but you have to put something in your matrix before printing it, or you will get a bunch of zeroes in the screen (in the best).
Try this:
program pp1;
const
m=10;
n=15;
type
matrix1=array[1..m] of integer;
matrix2=array[1..n] of integer;
var
m1:matrix1;
m2:matrix2;
procedure fillMatrix(var data:array of integer; x:integer);
var
j:integer;
begin
for j:= 1 to x do begin
data[j]:=j;
end;
end;
procedure writeMatrix(var data: array of integer; x:integer);
var
j:integer;
begin
for j:=1 to x do
begin
write(data[j]:3);
end;
end;
begin
fillMatrix(m1,10);
fillMatrix(m2,10);
writeMatrix(m1,10);
writeMatrix(m2,10);
readln;
readln;
end.
Hint: consider avoid using global variables, m1 and m2 in this case should be declared in the main program.
How can i use the same this writeMatrix method to print both of the arrays.. Is there any stranded way to do it.
Yes, there is a standard way to this. It is called conformant-array parameters. It is standardized in (level 1) of the ISO standard 7185 (Standard “Unextended” Pascal). It looks like this:
procedure print(protected matrix: array[
columnMinimum..columnMaximum: integer;
rowMinimum..rowMaximum: integer
] of integer);
const
totalWidth = 6;
var
x: type of columnMinimum;
y: type of rowMinimum;
begin
for y := rowMinimum to rowMaximum do
begin
for x := columnMinimum to columnMaximum do
begin
write(matrix[x, y]:totalWidth);
end;
writeLn;
end;
end;
It’s as if there were additional const values, but they are dynamic depending on the passed matrix. This code furthermore uses type inquiries (type of …) and the protected modifier, both defined in ISO 10206 (Extended Pascal) which builds on top of ISO 7185. In EP you could and would also consider schemata to pass such data as parameters.
I'm using Pascal. I have a problem when dealing with reading file.
I have a file with integer numbers. My pascal to read the file is:
read(input, arr[i]);
if my file content is 1 2 3 then it's good but if it is 1 2 3 or 1 2 3(enter here) (there is a space or empty line at the end) then my arr will be 1 2 3 0.
From what I can recall read literally reads the file as a stream of characters, of which a blank space and carriage return are, but I believe these should be ignored as you are reading into an integer array. Does your file actually contain a space character between each number?
Another approach would be to use readLn and have the required integers stored as new lines in the file, e.g.
1
2
3
I have tested the problem on Delphi 2009 console applications. Code like this
var
F: Text;
A: array[0..99] of Integer;
I, J: Integer;
begin
Assign(F, 'test.txt');
Reset(F);
I:= -1;
while not EOF(F) do begin
Inc(I);
Read(F, A[I]);
end;
for J:= 0 to I do write(A[J], ' ');
Close(F);
writeln;
readln;
end.
works exactly as you have written. It can be improved using SeekEOLN function that skips all whitespace characters; the next code does not produce wrong additional zero:
var
F: Text;
A: array[0..99] of Integer;
I, J: Integer;
begin
Assign(F, 'test.txt');
Reset(F);
I:= -1;
while not EOF(F) do begin
if not SeekEOLN(F) then begin
Inc(I);
Read(F, A[I]);
end
else Readln(F);
end;
for J:= 0 to I do write(A[J], ' ');
Close(F);
writeln;
readln;
end.
Since all that staff is just a legacy in Delphi, I think it must work in Turbo Pascal.
You could read the string into a temporary and then trim it prior to converting it.
It doesnt hurt to mention basics like what type of Pascal on what platform you're using in order that people can give a specific answer (as the article notes, there isnt a nice way OOTB in many Pascals)
If I recall there was a string function called Val that converts a string to a number...my knowledge of Pascal is a bit rusty (Turbo Pascal v6)
var
num : integer;
str : string;
begin
str := '1234';
Val(str, num); (* This is the line I am not sure of *)
end;
Hope this helps,
Best regards,
Tom.