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  1. #include <stdio.h>
  2. #include <math.h>
  3. typedef struct{
  4. double x;
  5. double y;
  6. }Point;
  7.  
  8. Point scan_point(void);
  9. double area_of(Point p1, Point p2);
  10. double circumference_of(Point p1, Point p2);
  11.  
  12. int main(void) {
  13.     printf("左上隅と右下隅の座標を入力してください。\n");
  14.     Point p1=scan_point();
  15.     printf("座標1(%.2f, %.2f)\n", p1.x, p1.y);
  16.     Point p2=scan_point();
  17.     printf("座標2(%.2f, %.2f)\n", p2.x, p2.y);
  18.     double area=area_of(p1, p2);
  19.     double circumference=circumference_of(p1, p2);
  20.  
  21.     printf("面積:%.2f\n",area);
  22.     printf("周囲の長さ:%.2f\n",circumference);
  23.  
  24.     return 0;
  25. }
  26.  
  27. Point scan_point(void) {
  28.     Point p;
  29. scanf("%lf %lf", &p.x, &p.y);
  30. return p;
  31. }
  32. double area_of(Point p1, Point p2) {
  33.     double width = fabs(p2.x - p1.x);
  34.     double height = fabs(p2.y - p1.y);
  35.     return width * height;
  36. }
  37.  
  38. double circumference_of(Point p1, Point p2) {
  39.     double width = fabs(p2.x - p1.x);
  40.     double height = fabs(p2.y - p1.y);
  41.     return 2.0 * (width + height);
  42. }
  43.  
  44.  
Success #stdin #stdout 0s 5324KB
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stdin
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2.0 2.0
0.0 0.0
stdout
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左上隅と右下隅の座標を入力してください。
座標1(2.00, 2.00)
座標2(0.00, 0.00)
面積:4.00
周囲の長さ:8.00
https://ideone.com/r5OwoP
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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