a simple entity relationship digram for library management system

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E R Diagram: er diagram library management system

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REFLECTION OF A TRIANGLE (COMPUTER GRAPHICS)

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#include<stdio.h> #include<conio.h> #include<graphics.h> #include<stdlib.h> void main() { int gd=DETECT,gm; int x1,y1,x2,y2,x3,y3; char a; clrscr(); initgraph(&gd,&gm,""); printf("\n enter the coordinates of triangle"); sacnf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2,&x3,&y3); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); line(320,0,320,430); line(0,240,640,240); printf("\n enter the axis of reflection"); scanf("%d",&a); if(a='x'||a='X') { x1=x1; x2=x2; x3=x3; y1=y1+240; y2=y2+240; y3=y3+240; } else if(a='y'||a='Y') { y1=y1; y2=y2; y3=y3; x1+=320; x2+=320; x3+=320; } printf("\n triangle after reflection"); line(x1,y1,x2,y2); line(x2,y2,x3,y3); line(x3,y3,x1,y1); getch(); closegraph(); }
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