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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.  
  15. 	Point p1, p2;
  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. 	printf("座標１");
  20. 	p1 = scan_point();
  21. 	printf("(%.2f, %.2f)\n", p1.x, p1.y);
  22.  
  23. 	printf("座標２");
  24. 	p2 = scan_point();
  25. 	printf("(%.2f, %.2f)\n", p2.x, p2.y);
  26.  
  27. 	printf("面積：%.2f\n",area_of(p1, p2));
  28. 	printf("周囲の長さ：%.2f\n", circumference_of(p1, p2));
  29.  
  30. 	return 0;
  31. }
  32.  
  33. Point scan_point(void){
  34. 	Point p;
  35. 	scanf("%lf %lf", &p.x, &p.y);
  36. 	return p;
  37. }
  38.  
  39. double area_of(Point p1, Point p2){
  40. 	return fabs((p2.x-p1.x)*(p2.y-p1.y));
  41. }
  42.  
  43. double circumference_of(Point p1, Point p2){
  44. 	return fabs(((p2.x-p1.x)+(p2.y-p1.y))*2);
  45. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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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/Dt3a8Y
６回課題
language:
C99 (gcc 8.3)
created:
19 days ago
visibility:
public

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