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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4.  typedef struct
  5.  {
  6.  	double x;
  7.  	double y;
  8.  }Point;
  9.  
  10.  Point scan_point(void)
  11.  {
  12.  	Point p;
  13.  	scanf("%lf",&p.x);
  14.  	scanf("%lf",&p.y);
  15.  	return p;
  16.  }
  17.  
  18.  double area_of(Point p1, Point p2)
  19.  {
  20.  	double area;
  21.  	area=(p1.x-p2.x)*(p1.y-p2.y);
  22.  	area=fabs(area);
  23.  	return area;
  24.  }
  25.  
  26.  double circumference_of(Point p1, Point p2)
  27.  {
  28.  	double length;
  29.  	length=(p1.x-p2.x)*2+(p1.y-p2.y)*2;
  30.  	length=fabs(length);
  31.  	return length;
  32.  }
  33.  
  34. int main(void) {
  35.  
  36. 	Point p1,p2;
  37. 	double area,length;
  38.  
  39. 	p1=scan_point();
  40. 	p2=scan_point();
  41. 	area=area_of(p1,p2);
  42. 	length=circumference_of(p1,p2);
  43.  
  44. 	printf("座標1：(%.2lf,%.2lf)\n",p1.x,p1.y);
  45. 	printf("座標2：(%.2lf,%.2lf)\n",p2.x,p2.y);
  46. 	printf("面積：%.2lf\n",area);
  47. 	printf("周囲の長さ：%.2lf",length);
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 5304KB
comments (?)
stdin 
0
0
1
1
stdout 
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/9m1jq4
language:
C (gcc 8.3)
created:
14 days ago
visibility:
public

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