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  1. #include <stdio.h>
  2. #include <math.h>
  3. typedef struct{
  4. 	double x;
  5. 	double y;
  6. } Point;
  7. Point scan_point(void) {
  8.     Point p;
  9.     scanf("%lf", &p.x);
  10.     scanf("%lf", &p.y);
  11.     return p;
  12. }
  13. double area_of(Point p1, Point p2) {
  14.     double w=fabs(p2.x-p1.x);
  15.     double h=fabs(p2.y-p1.y);
  16.     return w*h;
  17. }
  18. double circumference_of(Point p1, Point p2) {
  19.     double w=fabs(p2.x-p1.x);
  20.     double h=fabs(p2.y-p1.y);
  21.     return 2*(w+h);
  22. }
  23.  
  24.  
  25. int main(void) {
  26. 	printf("左上隅と右下隅の座標を入力してください。\n");
  27.     Point p1 = scan_point();
  28.     printf("座標1(%.2f,%.2f)\n",p1.x,p1.y);
  29.     Point p2 = scan_point();
  30.     printf("座標2(%.2f,%.2f)\n",p2.x,p2.y);
  31.     printf("面積: %.2f\n", area_of(p1,p2));
  32.     printf("周囲の長さ: %.2f\n", circumference_of(p1,p2));
  33.  
  34. 	return 0;
  35. }
  36.  
Success #stdin #stdout 0s 5320KB
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0 0 1 1
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(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/VKzFS7
language:
C99 (gcc 8.3)
created:
14 days ago
visibility:
public

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