Rotation a triangle C++ Code

Learn here Rotation a triangle C++ Code.

#include<stdio.h>
#include<graphics.h>
#include<math.h>

#define PI acos(-1)

int main()
{
    int gd=0,gm,x1,y1,x2,y2,x3,y3;
    double s,c, angle;
    initgraph(&gd, &gm, "");

    printf("Enter coordinates of line: ");
    scanf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2, &x3, &y3);
    cleardevice();

    line(x1,y1,x2,y2);
    line(x2,y2,x3,y3);
    line(x3,y3,x1,y1);
    //getch();


    printf("Enter rotation angle: ");
    scanf("%lf", &angle);

    c = cos(angle * PI /180);
    s = sin(angle * PI /180);

    x1 = floor(x1 * c + y1 * s);
    y1 = floor(-x1 * s + y1 * c);

    x2 = floor(x2 * c + y2 * s);
    y2 = floor(-x2 * s + y2 * c);

    x3 = floor(x3 * c + y3 * s);
    y3 = floor(-x3 * s + y3 * c);

   // printf("%d %d %d %d", x1, y1, x2, y2);
    cleardevice();
    line(x1, y1, x2, y2);
    line(x2, y2, x3, y3);
    line(x3, y3, x1, y1);

    getch();
    closegraph();
    return 0;
}

#include<stdio.h>

#include<graphics.h>

#include<math.h>

#define PI acos(-1)

int main()

{

int gd=0,gm,x1,y1,x2,y2,x3,y3;

double s,c, angle;

initgraph(&gd, &gm, "");

printf("Enter coordinates of line: ");

scanf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2, &x3, &y3);

cleardevice();

line(x1,y1,x2,y2);

line(x2,y2,x3,y3);

line(x3,y3,x1,y1);

//getch();

printf("Enter rotation angle: ");

scanf("%lf", &angle);

c = cos(angle * PI /180);

s = sin(angle * PI /180);

x1 = floor(x1 * c + y1 * s);

y1 = floor(-x1 * s + y1 * c);

x2 = floor(x2 * c + y2 * s);

y2 = floor(-x2 * s + y2 * c);

x3 = floor(x3 * c + y3 * s);

y3 = floor(-x3 * s + y3 * c);

// printf("%d %d %d %d", x1, y1, x2, y2);

cleardevice();

line(x1, y1, x2, y2);

line(x2, y2, x3, y3);

line(x3, y3, x1, y1);

getch();

closegraph();

return 0;

}

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Rotation a triangle C++ Code

Rotation a triangle C++ Code

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