C / C++ / MFC

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <conio.h>
#include <graphics.h>




void main()
{

   int gd,gm;
   char ch;
   float y,x,m,incx,r,cx,cy,angle;
   float x1,y1,x2,y2,incy;


   gd=DETECT;
   initgraph(&gd,&gm,"c:\\borlandc\\bgi");
   printf("Enter value of X1:");
   scanf("%f", &x1);
   printf("Enter value of Y1:");
   scanf("%f", &y1);
   printf("Enter value of X2:");
   scanf("%f", &x2);
   printf("Enter value of Y2:");
   scanf("%f", &y2);

//this part will draw horizontal, +ve and -ve gradient lines
   do{
   y=( (y2-y1)/(x2-x1) ) * incx+y1;
   x=x1+incx++;
   putpixel((int)x,479-(int)y,YELLOW);

 }  while(x<x2);

  if((x2>x1)&&(y2>=y1))
 {
   incx=1;
 }
  if((x2<x1)&&(y2<=y1))
 do {
   y=( (y2-y1)/(x2-x1) ) * incx+y1;
   x=x1+incx--;
   putpixel((int)x,479-(int)y,YELLOW);
 } while(x>x2);





//this part of the code will draw vertical lines


  do {

   x=( (x2-x1)/(y2-y1) ) * incy+x1;
   y=y1+incy++;

   putpixel((int)x,479-(int)y,YELLOW);


 } while(y<y2);

 if((x2==x1)&&(y2>y1))
 {
   incy=1;
 }
 else

 do{
   x=( (x2-x1)/(y2-y1) ) * incy+x1;
   y=y1+incy--;
    putpixel((int)x,479-(int)y,YELLOW);

 } while(y>y2);


   ch=getch();
   closegraph();

 }<code></code>

&listObject2,int i)
{

Employer emp;

fstream RanFile("Employer.dat",ios::in | ios::out |ios::binary);
if (RanFile)
{
while(!listObject2.isEmpty())

{
RanFile.seekp(sizeof(Employer) * (i- 1));
RanFile.write(reinterpret_cast< const char *>(&emp),sizeof(Employer));
cout<<"file was updated";
break;

}
}
else
{

cerr<<"Error the file was not found";
}

}
template<typename t="">
void DisplayEmployeeRan(List<t> &listObject3)
{
char ans; //answer to store 'y' or 'n'
Employer emp;
int in;
ifstream RanFile("Employer.dat",ios::in |ios::binary);
if (RanFile)
{
while ( !listObject3.isEmpty( ))
{
cout <<"\nEnter employee's id number to"<< " display ";
cin >> in;
RanFile.seekg(sizeof(Employer) *(in - 1));
RanFile.read(reinterpret_cast<char *=""> (&emp),sizeof(Employer));

//if not eof show data
if(! RanFile.eof())
{
//Display the processed
// info for the employee

listObject3.print();

} cout << "Display another "<<"employee's information? [y/n] ";
fflush(stdin);
ans = ' ';
while (ans != 'y' && ans != 'Y'
&& ans != 'n' && ans != 'N')
{
ans = _getch();
} cout << endl;
if (ans == 'n' || ans == 'N')
{
exit(1);
}
}
} else
{
cout <<"Error - random files could not be opened.";
}
}





int main()
{
// InitialEmployerRan();
List <employer> EmpList;
TestList(EmpList);


system("Pause");
return 0;
}