Borland C++ help for project!

[pranavnair97]

# include <iostream.h>
# include <conio.h>
# include <stdlib.h>
# include <stdio.h>
# include <dos.h>
# include <string.h>
struct stock{
char name[100];
char commodity[100];
float current;
float previous;
float change;
}c[50];



void select(stock c[]);
void categories(stock c[]);
void descending(stock c[]);

void main()
{
 strcpy(c[0].name,"Google");
strcpy(c[0].commodity,"Internet");
c[0].current=1085.35;
c[0].previous=1059.5;

strcpy(c[1].name,"Konami");
strcpy(c[1].commodity,"Games(ADR)");
c[1].current=24.38;
c[1].previous=24.28;

strcpy(c[2].name,"Yahoo");
strcpy(c[2].commodity,"Internet");
c[2].current=39.57;
c[2].previous=38.2;

strcpy(c[3].name,"Samsung");
strcpy(c[3].commodity,"Electronics");
c[3].current=1085.35;
c[3].previous=1,400.00;

strcpy(c[4].name,"Bank Of America");
strcpy(c[4].commodity,"Banking and Finance");
c[4].current=15.30;
c[4].previous=15.65;

strcpy(c[5].name,"Ford Motor");
strcpy(c[5].commodity,"Automobile");
c[5].current=16.42;
c[5].previous=16.7;

strcpy(c[6].name,"Nokia");
strcpy(c[6].commodity,"Electronics(ADR)");
c[6].current=17.86;
c[6].previous=17.80;

strcpy(c[7].name,"Coco Cola");
strcpy(c[7].commodity,"Consumer Product");
c[7].current=39.93;
c[7].previous=40.25;

strcpy(c[8].name,"Disney");
strcpy(c[8].commodity,"Consumer Product");
c[8].current=69.62;
c[8].previous=71.5;

strcpy(c[9].name,"Twitter");
strcpy(c[9].commodity,"Internet");
c[9].current=59.00;
c[9].previous=47.2;

strcpy(c[10].name,"PEPSI CO.");
strcpy(c[10].commodity,"Consumer Product");
c[10].current=80.93;
c[10].previous=82.4;

strcpy(c[11].name,"Toyota Motor Corporation");
strcpy(c[11].commodity,"Automobile(ADR)");
c[11].current=119.22;
c[11].previous=122.3;

strcpy(c[12].name,"Apple Inc.");
strcpy(c[12].commodity,"Electronics");
c[12].current=554.33;
c[12].previous=560.00;

strcpy(c[13].name,"Hewlett Packard");
strcpy(c[13].commodity,"Electronics");
c[13].current=26.77;
c[13].previous=27.5;

strcpy(c[14].name,"Intel Co-orporation");
strcpy(c[14].commodity,"Electronics");
c[14].current=1085.35;
c[14].previous=1059.5;

strcpy(c[15].name,"AMD");
strcpy(c[15].commodity,"Electronics");
c[15].current=3.69;
c[15].previous=3.69;

strcpy(c[16].name,"Aeropostale Inc");
strcpy(c[16].commodity,"Consumer Products");
c[16].current=8.15;
c[16].previous=9.0;

strcpy(c[17].name,"The Boeing Company");
strcpy(c[17].commodity,"Automobile");
c[17].current=133.83;
c[17].previous=130.1;

strcpy(c[18].name,"Canon INC");
strcpy(c[18].commodity,"Consumer Product");
c[18].current=31.65;
c[18].previous=29.85;

strcpy(c[19].name,"Colgate-Palmolive Company");
strcpy(c[19].commodity,"Consumer Product");
c[19].current=63.98;
c[19].previous=63.78;

strcpy(c[20].name,"Dolby Laboratories, Inc.");
strcpy(c[20].commodity,"Electronics");
c[20].current=37.00;
c[20].previous=35.98;


float o;
for(int i = 0; i<50;i++)
{
o = ((c[i].current-c[i].previous)/c[i].previous);
c[i].change = o;
}
cout <<"Kindly select what you would like to do :\t1 - Browse stocks of companies based on category\t2 - Search the current stock details of your desired company\t3 - See the list of companies based on descending order of increase in stocks\t";
cout << "Please enter the serial number of your desired operation : ";
int n;
cin >> n;
if (n==1)
categories(c);
if(n==2)
select(c);
if(n==3)
descending(c);
getch();
}

void select(stock c[50])
{
clrscr();
cout << "The list of companies are :\n1 - Google\n2 - Konami\n3 - Yahoo\n4 - Samsung\n5 - Bank Of America\n6 - Ford Motors\n7 - Nokia\n8 - Coco Cola\n9 - Disney\n10 - Twitter\n11 - PEPSI CO." ;
cout <<"Kindly give the serial number of the company whose stocks you\nto see : ";
int k;
cin >> k;
int f=(k-1);
cout <<"\nThe stock details of the required compaines are :\n " ;
cout <<"\nCompany name : " << c[f].name;
cout <<"\nCommodity Type : " <<c[f].commodity;
cout <<"\nCurrent stock price : " <<c[f].current;
cout <<"\nStock price 3 days back : " <<c[f].previous;
cout <<"\nChange in stocks in 3 days : " <<c[f].change<<"\n\n";
}

void categories(stock c[50])
{
clrscr();
int n;
cout <<"The categories that the companies belong to are :\n1 - Internet\n2 - Games\n3 - Electronics\n4 - Banking and Finance\n5 - Consumer Products\n6 - Automobile\n7 - ADR";
cout <<"Kindly enter the serial number of the category of which you would like\nto view stocks of :\n" ;
cout << "Serial number : ";
cin >> n;
for(int i=0 ; i<50 ; i++)
{
if (n==1)
{
if(strcmp(c[i].commodity,"Internet"))
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
}
}
if (n==2)
{
if(strcmp(c[i].commodity,"Games"))
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";;
}
}
if (n==3)
{
if(strcmp(c[i].commodity,"Electronics"))
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
}
}
if (n==4)
{
if(strcmp(c[i].commodity,"Banking and Finance"))
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
}
}
if (n==5)
{
if(strcmp(c[i].commodity,"Consumer Product") )
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
}
}
if (n==6)
{
if(strcmp(c[i].commodity,"Automobile"))
{
cout << c[i].name <<"\n";
cout << "Current stock price : "<<c[i].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[i].change<<"\n\n\n";
}
}
}
if(n==7)
{
cout << c[1].name<<endl;
cout << "Current stock price : "<<c[1].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[1].change<<"\n\n\n";
cout << c[6].name<<endl;
cout << "Current stock price : "<<c[6].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[6].change<<"\n\n\n";
cout << c[11].name<<endl;
cout << "Current stock price : "<<c[11].current << "\n";
cout << "Change in stocks as compared to last week : "<<c[11].change<<"\n\n\n";
}
}
void descending(stock c[50])
{
cout << "The list of companies in decreasing order of weekly stock increases\nare: " ;
stock a[50];
float k;
a[50]=c[50];
for(int i=0;i<50;i++)
{
 for(int j = 0; j<50;j++)
 {
  if(a[j].change<a[j+1].change)
  {
   k = a[j].change;
   a[j]=a[j+1];
   a[j+1].change=k;
   }
  }
 }
 for (int i=0;i<50;i++)
 {
 cout << (i+1) << " ) " << "Name : " << a[i].name<<endl;
 cout <<"    "<< "Weekly Change : " <<a[i].change<<" %";
 }
 }

So thats my project(i actually have put 50 entries , but havent put them because of the word limit), and i have corrected all errors present in it , but it still doesnt seem to work! Whenever i run the program , it simply diaplys a 'thread stopped' message , and displays an empty window. Also , the line -
o = ((c[i].current-c[i].previous)/c[i].previous);
is highlited in blue. I am just a student and have learned c++ only for 3 months , so dont have much idea of it. Please do help me and tell me why this error occurs , and how i can correct it!

[3qX21hU5]

First I would suggest moving this to the beginners section since you will probably find help much sooner by posting there.

Second make sure you put your code in code tags (The <> button, just highlight all your code and click the button.).

Third Please be more specific on what is going wrong with your program. Most members won't take the time to read through all the code (Specially when there is no code tags and the code is not formatted) to find the errors. So be sure to include the full error codes (Including line numbers) or give very detailed descriptions on what it is doing that it shouldn't be doing. The more information that you give the better. We don't want to just fix it for you and move on, that isn't helping you. Instead we would like to help you fix it by giving you hints and helping you understand why it isn't working. So the more information we have the better we can do that.

And last but not least get a better compiler ;p. Borland is sooo very old and outdated (It is 2 major versions of C++ behind or in other words it has been about 15 years since it has seen a update)... I would suggest trying out the codeblocks IDE which comes with MingGW preinstalled since that IDE is quite beginner friendly, or there is always Visual Studios on windows or whatever IDE or text editor you prefer if you are on *nix.