LetUsCPlusPlus/CAPTCHA2.CPP at main · Balaji4/LetUsCPlusPlus · GitHub

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#include<stdlib.h>
#include<dos.h>
#include<graphics.h>
#include<conio.h>

main()
{
   int i = 0, key, num, midx, gd = DETECT, gm;
   char a[10];

   initgraph(&gd,&gm,"C:\\TC\\BGI");

   midx = getmaxx()/2;

   settextstyle(SCRIPT_FONT,HORIZ_DIR,5);
   settextjustify(CENTER_TEXT,CENTER_TEXT);
   setcolor(GREEN);
   outtextxy(midx,20,"CAPTCHA");
   settextstyle(SCRIPT_FONT,HORIZ_DIR,3);
   outtextxy(midx,125,"Press any key to change the generated random code \"captcha\"");
   outtextxy(midx,150,"Press escape key to exit...");

   setcolor(WHITE);
   setviewport(100,200,600,400,1);
   setcolor(RED);
   randomize();

   while(1)
   {
      while(i<6)
      {
	 num = random(3);

	 if ( num == 0 )
	    a[i] = 65 + random(26);     /* 65 is the ASCII value of A */
	 else if ( num == 1)
	    a[i] = 97 + random(26);     /* 97 is the ASCII value of a */
	 else
	    a[i] = 48 + random(10);     /* 48 is the ASCII value of 0 */
	 i++;
      }
      a[i] = '\0';
      char b[2];
      b[0]=a[0];
      b[1]='\0';
      settextstyle(SCRIPT_FONT,HORIZ_DIR,random(3));
      outtextxy(210,100,b);
      b[0]=a[1];
      settextstyle(SCRIPT_FONT,HORIZ_DIR,random(3));
      outtextxy(215,100,b);
      b[0]=a[2];
      settextstyle(SCRIPT_FONT,HORIZ_DIR,random(3));
      outtextxy(223,100,b);
      b[0]=a[3];
      settextstyle(SCRIPT_FONT,HORIZ_DIR,random(3));
      outtextxy(229,100,b);
      b[0]=a[4];
      settextstyle(SCRIPT_FONT,HORIZ_DIR,random(3));
      outtextxy(236,100,b);
      key = getch();

      if( key == 27 )                     /* escape key*/
	 exit(0);
      clearviewport();
      i = 0;
   }
}