C program for Bubble coming out of a bottle

Program: Bubble coming out of a bottle.
Language : C

Computer Graphics
#include<stdio.h>
#include<math.h>
#include<conio.h>
#include<graphics.h>
void main()
{
int i;
int gd=DETECT,gmode;
initgraph(&gd,&gmode,"");
for(i=0;i<300;i+=5)
{
    ellipse(300,400,0,360,50,10);
    line(250,400,250,275);
    line(350,400,350,275);
    ellipse(300,200,0,360,20,5);
    line(280,240,280,200);

C program for Analog Clock

#include<graphics.h>
#include<conio.h>
#include<math.h>
#include<dos.h>
void main()
{
int gd=DETECT,gm;
int x=320,y=240,r=200,i,h,m,s,thetamin,thetasec;
struct  time t;
char n[12][3]={"3","2","1","12","11","10","9","8","7","6","5","4"};
initgraph(&gd,&gm,"c:\bin\tc");//put the directory which containsegavga.bgi
circle(x,y,220);
setcolor(4);
settextstyle(4,0,5);
for(i=0;i<12;i++)
{
if(i!=3)

security in computing full notes

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simple 2D rotation for a triangle using C

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
#include<stdlib.h>
void draw (int x1,int y1,int x2,int y2,int x3,int y3);
//int x1,y1,x,y,sx,i,j;
void main()
{
int x1,y1,x2,y2,x3,y3,x,y;
int gdriver=DETECT,gmode,errorcode;
initgraph(&gdriver,&gmode,"c:\tc\bin\bgi");
printf("\n Enter the co ordinates");
scanf("%d%d",&x1,&y1);
scanf("%d%d",&x2,&y2);
scanf("%d%d",&x3,&y3);
line (x1,y1,x2,y2);
line(x2,y2,x3,y3);
line(x3,y3,x1,y1);
draw(x1,y1,x2,y2,x3,y3);
getch();
}
void draw(int x1,int y1,int x2,int y2,int x3,int y3)
{
int x,y,p,q,d,a1,b1 ,a2,b2,a3,b3;
float a;
printf("\n Enter the rotation point");
scanf("%d%d",&x,&y);
printf("\n Enter the rotation angle");
scanf("%d",&d);
p=x;
q=y;
a=((d*3.14)/180);
a1=p+(x1-p)*cos(a)-(y1-q)*sin(a);
b1=p+(y1-p)*sin(a)+(x1-q)*cos(a);
a2=p+(x2-p)*cos(a)-(y2-q)*sin(a);
b2=p+(y2-p)*sin(a)+(x2-q)*cos(a);
a3=p+(x3-p)*cos(a)-(y3-q)*sin(a);
b3=p+(y3-p)*sin(a)+(x3-q)*cos(a);
line(a1,b1,a2,b2);
line(a2,b2,a3,b3);
line(a3,b3,a1,b1);
}

Simple 3D translation for a Rectangle in C

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<ctype.h>
#include<stdlib.h>
#define CLIP_ON 1
int rect(int x1,int x2,int y1,int y2);
int tran(int tx,int ty) ;
int x1,y1,x2,y2,tx,ty;
void main()
{
int gdriver=DETECT,gmode,errorcode;
initgraph(&gdriver,&gmode,"c:\tc\bin\bgi");
clrscr();
printf("\n Enter points");
scanf("%d%d%d",&x1,&y1,&x2,&y2);
rect(x1,y1,x2,y2);
printf("\n Enter the value for tx,ty");
scanf("%d%d",&tx,&ty);
tran(tx,ty);
getch();
}

int rect(x1,y1,x2,y2)
{
rectangle(x1,y1,x2,y2);
bar3d(x1,y1,x2,y2,20,1);
}
int tran(tx,ty)
{
rectangle(x1+tx,y1+ty,x2+tx,y2+ty);
bar3d(x1+tx,y1+ty,x2+tx,y2+ty,20,1);
}

simple 2D line rotation C program

#include
#include
#include
#include
int x0,y0,x1,y1,tx,ty;
void main()
{
int gdriver=DETECT,gmode,errorcode;
initgraph(&gdriver,&gmode,"c:\tc\bgi");
printf("\nEnter the start points of line:");
scanf("%d%d",&x0,&y0);
printf("\nEnter the end points of line:");
scanf("%d%d",&x1,&y1);
printf("\nEnter the translation co-ordinates:");
scanf("%d%d",&tx,&ty);
setcolor(YELLOW);
line(x0,y0,x1,y1);
setviewport(x0,y0,getmaxx()-20,getmaxy()-20,50);
line(x0+tx,y0+ty,x1+tx,y1+ty);
getch();
}