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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(void);
  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.     double area, circumference;
  16.  
  17.     printf("左上隅と右下隅の座標を入力してください。\n");
  18.  
  19.     p1 = scan_point();
  20.  
  21.     p2 = scan_point();
  22.  
  23.     area = area_of(p1, p2);
  24.     circumference = circumference_of(p1, p2);
  25.  
  26.     printf("座標1(%.2f, %.2f)\n", p1.x, p1.y);
  27.     printf("座標2(%.2f, %.2f)\n", p2.x, p2.y);
  28.     printf("面積：%.2f\n", area);
  29.     printf("周囲の長さ：%.2f\n", circumference);
  30.  
  31.     return 0;
  32. }
  33.  
  34. Point scan_point(void) {
  35.     Point p;
  36.     scanf("%lf %lf", &p.x, &p.y);
  37.     return p;
  38. }
  39.  
  40. double area_of(Point p1, Point p2) {
  41.     double width = fabs(p2.x - p1.x);
  42.     double height = fabs(p2.y - p1.y);
  43.     return width * height;
  44. }
  45.  
  46. double circumference_of(Point p1, Point p2) {
  47.     double width = fabs(p2.x - p1.x);
  48.     double height = fabs(p2.y - p1.y);
  49.     return 2 * (width + height);
  50. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
0.00
0.00
1.00
1.00
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(1.00, 1.00)
面積：1.00
周囲の長さ：4.00
https://ideone.com/j9gZPg
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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