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# Tocka lab 1.1

Mar 11th, 2020
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1. #include<stdio.h>
2. #include<math.h>
3. typedef struct point2D {
4.     double x;
5.     double y;
6.
7. }
8. point2D;
9. float distance (point2D t1, point2D t2) {
10.
11.
12.     return sqrt((t1.x-t2.x)*(t1.x-t2.x)+(t1.y-t2.y)*(t1.y-t2.y));
13.
14. }
15. typedef struct point3D {
16.     double x;
17.     double y;
18.     double z;
19. }
20. point3D;
21. float distance3D(point3D t1, point3D t2) {
22.
23.     return sqrt((t1.x-t2.x)*(t1.x-t2.x)+(t1.y-t2.y)*(t1.y-t2.y)+(t1.z-t2.z)*(t1.z-t2.z));
24.
25. }
26. int collinear(point2D t1,point2D t2, point2D t3) {
27.     if((t2.y-t1.y)/(t2.x-t1.x)==(t3.y-t2.y)/(t3.x-t2.x))
28.         return 1;
29.     else
30.         return 0;
31.
32. }
33. int main() {
34.     float x1, y1, x2, y2;
35.     scanf("%f %f", &x1, &y1);
36.     scanf("%f %f", &x2, &y2);
37.     point2D t1 = { x1, y1 };
38.     point2D t2 = { x2, y2 };
39.     printf("%.2f\n", distance(t1, t2));
40.     float z1, z2;
41.     scanf("%f %f", &z1, &z2);
42.     point3D t3 = {x1, y1, z1};
43.     point3D t4 = {x2, y2, z2};
44.     printf("%.2f\n", distance3D(t3, t4));
45.     point2D t5 = {z1, z2};
46.     printf("%d\n", collinear(t1, t2, t5));
47.     return 0;
48. }
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