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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct {
  5.     double x;
  6.     double y;
  7. } Point;
  8.  
  9. Point scan_point(int n);
  10. double area_of(Point p1, Point p2);
  11. double circumference_of(Point p1, Point p2);
  12.  
  13. int main(void) {
  14.     Point p1, p2;
  15.  
  16.     printf("左上隅と右下隅の座標を入力してください。\n");
  17.     p1 = scan_point(1);
  18.     p2 = scan_point(2);
  19.  
  20.     double area = area_of(p1, p2);
  21.     double circum = circumference_of(p1, p2);
  22.  
  23.     printf("面積：%.2f\n", area);
  24.     printf("周囲の長さ：%.2f\n", circum);
  25.  
  26.     return 0;
  27. }
  28.  
  29. Point scan_point(int n){
  30.     Point p;
  31.     printf("座標%d (%.2f, %.2f)\n", n, p.x, p.y);
  32.     return p;
  33. }
  34.  
  35. double area_of(Point p1, Point p2){
  36.     double width = fabs(p2.x - p1.x);
  37.     double height = fabs(p2.y - p1.y);
  38.     return width * height;
  39. }
  40.  
  41. double circumference_of(Point p1, Point p2) {
  42.     double width = fabs(p2.x - p1.x);
  43.     double height = fabs(p2.y - p1.y);
  44.     return 2.0 * (width + height);
  45. }
  46.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
0 0
3 4
stdout 
左上隅と右下隅の座標を入力してください。
座標1 (0.00, 0.00)
座標2 (0.00, 0.00)
面積：0.00
周囲の長さ：0.00
https://ideone.com/S4hYtq
language:
C (gcc 8.3)
created:
14 days ago
visibility:
public

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