1) Insert information
2)search by student number
3)display all information
4)delete by student number
5)Exit
please enter your choice
======================================…
write a program that has the above menu & Contains(max) 100 students with the information(name/students number(code)/field/term)....store them & can do the above performance(in the above menu)
note: without using 'record'

: 1) Insert information
: 2)search by student number
: 3)display all information
: 4)delete by student number
: 5)Exit
: please enter your choice
: ======================================…
: write a program that has the above menu & Contains(max) 100 students
: with the information(name/students number(code)/field/term)....store
: them & can do the above performance(in the above menu)
: note: without using 'record'
:

That looks like a homework assignment to me, so no code this time... start writing yourself and ask for help with code examples if you get stuck. Hint: use arrays if you cannot use records.

program StudentManagement;
{
Author:
This program adds, deletes, searches students in an array.
}

uses
crt;

var
names, fields, terms: array[1..100] of String;
codes: array[1..100] of Integer;
n: Integer;

procedure display_information(i: Integer);
begin
Writeln(codes[i]);
Writeln(names[i]);
Writeln(fields[i]);
Writeln(terms[i]);
end;

procedure SetStudentInfo(nam: String; code: Integer; field: String; term: String; i: Integer);
begin
names[i] := nam;
codes[i] := code;
fields[i] := field;
terms[i] := term;
end;


procedure InsertInformation;
var
nam, field, term: String;
code: Integer;

begin
{Get details}
Write('Enter the name of the student: ');
Readln(nam);
Writeln;

Write('Enter the code: ');
Readln(code);
Writeln;

Write('Enter the field of the field: ');
Readln(field);
Writeln;

Write('Enter the term: ');
Readln(term);
Writeln;

{Set info for a new student with these details}
SetStudentInfo(nam, code, field, term, n+1);

n := n + 1; {Increment number of students by 1}
Writeln('The student has been added.');
end;

procedure SearchStudent;
var
code, i: Integer;

begin
Writeln('Enter the code of the student to search: ');
Readln(code);

for i := 1 to n do
begin
if codes[i] = code then
begin
Writeln('The student has been found.');
Writeln('Details are: ');
display_information(i);
Exit;
end;
end;

Writeln('The student with code ', code, ' is not present.');
end;

procedure DeleteStudent;
var
code, i, j: Integer;

begin
Write('Enter the code of the student to delete: ');
Readln(code);

for i := 1 to n do
begin
if codes[i] = code then
begin
{
Student has been found
The student at index i has to be deleted.
Therefore shift all students from index i to last by one step back
}

for j := i+1 to n do
begin
names[j-1] := names[j];
codes[j-1] := codes[j];
fields[j-1] := fields[j];
terms[j-1] := terms[j];
end;


{Decrement count of students by 1}
n := n - 1;
Writeln('The student with code ', code, ' has been deleted.');
Exit;
end;
end;

Writeln('The student with code ', code, ' is not present.');
end;


var
choice, i: Integer;
quit: Boolean;

begin
n := 0; {number of stuents}
quit := False;

while quit = false do
begin
Writeln('#####################################');
Writeln('Select an option from the following:');
Writeln('1) Insert information');
Writeln('2) Search and display all information by student number');
Writeln('3) Delete by student number');
Writeln('4)Exit');
Writeln('#####################################');

Readln(choice);
Case choice of
1: InsertInformation;
2: SearchStudent;
3: DeleteStudent;
4: quit := True;
else
Writeln('You made an invalid choice');


end;
end;
end.

well you know I've tried to do it....but I cannot run this in Borland Pascal!!!!what should I do???

You exceeded the maximum allowed data size in BP/TP (variables + constants), it must fit the data segment (65535 bytes), if you run it from FP it should work fine. To make it work under BP change the string variables to a reasonable length like 35 characters: names, fields, terms: array[1..100] of String[35];