Question

Write two C++ programs.

1, When we write a message then this message blinking out the screen.

2, When we write a message then the message scrolling out the screen.

Answer 1

Answer for 1:

#include <iostream>
#include <conio.h> 
#include <windows.h>
 using namespace std;
 int main(int argc, char** argv)
 {
   int x,y,i;char name[10];
   textcolor(10);
   x=wherex();y=wherey();       //corrdinates of caret will be stored in x & y.
   cout<<"\t\t\t\tWelcome\n";
   textcolor(15);
   cout<<"\nEnter your name\n";
   gets(name);
   while(1)
   {
      for(i=10;i<15;i++)
      {
         textcolor(i);
         gotoxy(x,y);          //Transferring caret to the coordinates stored in x & y.
         cout<<"\t\t\t\tWelcome";
         Sleep(300);
      }
   }
   return 0;
 }

Answer for 2:

#include <windows.h>
#include <stdio.h>
#include <conio.h>

HANDLE hStdout;

int ScrollByAbsoluteCoord(int iRows)
{
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
SMALL_RECT srctWindow;

// Get the current screen buffer size and window position.

if (! GetConsoleScreenBufferInfo(hStdout, &csbiInfo))
{
printf("GetConsoleScreenBufferInfo (%d)\n", GetLastError());
return 0;
}

// Set srctWindow to the current window size and location.

srctWindow = csbiInfo.srWindow;

// Check whether the window is too close to the screen buffer top

if ( srctWindow.Top >= iRows )
{
srctWindow.Top -= (SHORT)iRows; // move top up
srctWindow.Bottom -= (SHORT)iRows; // move bottom up

if (! SetConsoleWindowInfo(
hStdout, // screen buffer handle
TRUE, // absolute coordinates
&srctWindow)) // specifies new location
{
printf("SetConsoleWindowInfo (%d)\n", GetLastError());
return 0;
}
return iRows;
}
else
{
printf("\nCannot scroll; the window is too close to the top.\n");
return 0;
}
}

int ScrollByRelativeCoord(int iRows)
{
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
SMALL_RECT srctWindow;

// Get the current screen buffer window position.

if (! GetConsoleScreenBufferInfo(hStdout, &csbiInfo))
{
printf("GetConsoleScreenBufferInfo (%d)\n", GetLastError());
return 0;
}

// Check whether the window is too close to the screen buffer top

if (csbiInfo.srWindow.Top >= iRows)
{
srctWindow.Top =- (SHORT)iRows; // move top up
srctWindow.Bottom =- (SHORT)iRows; // move bottom up
srctWindow.Left = 0; // no change
srctWindow.Right = 0; // no change

if (! SetConsoleWindowInfo(
hStdout, // screen buffer handle
FALSE, // relative coordinates
&srctWindow)) // specifies new location
{
printf("SetConsoleWindowInfo (%d)\n", GetLastError());
return 0;
}
return iRows;
}
else
{
printf("\nCannot scroll; the window is too close to the top.\n");
return 0;
}
}

int main( void )
{
int i;

printf("\nPrinting twenty lines, then scrolling up five lines.\n");
printf("Press any key to scroll up ten lines; ");
printf("then press another key to stop the demo.\n");
for(i=0; i<=20; i++)
printf("%d\n", i);

hStdout = GetStdHandle(STD_OUTPUT_HANDLE);

if(ScrollByAbsoluteCoord(5))
_getch();
else return 0;

if(ScrollByRelativeCoord(10))
_getch();
else return 0;
}

Thanks