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  1. #include <stdio.h>
  2.  
  3. typedef struct{
  4.     double x;
  5.     double y;
  6. }Point;
  7.  
  8. double absolute(double val){
  9.     if(val<0){
  10.         return -val;
  11.     }
  12.     return val;
  13. }
  14.  
  15. Point scan_point(void){
  16.     Point p;
  17.     printf("X座標を入力:");
  18.     fflush(stdout);
  19.     scanf("%lf",&p.x);
  20.     printf("Y座標を入力:");
  21.     scanf("%lf",&p.y);
  22.     return p;
  23. }
  24.  
  25. double area_of(Point p1, Point p2){
  26.     double width=absolute(p1.x-p2.x);
  27.     double height=absolute(p1.y-p2.y);
  28.     return width*height;
  29. }
  30.  
  31. double circumference_of(Point p1, Point p2){
  32.     double width=absolute(p1.x-p2.x);
  33.     double height=absolute(p1.y-p2.y);
  34.     return 2.0*(width+height);
  35. }
  36.  
  37. int main(void){
  38.     printf("左上隅の座標を入力してください\n");
  39.     Point p1=scan_point();
  40.  
  41.     printf("\n右下隅の座標を入力してください\n");
  42.     Point p2=scan_point();
  43.  
  44.     double area=area_of(p1, p2);
  45.     double circumference=circumference_of(p1, p2);
  46.  
  47.     printf("\n面積:%.2f\n",area);
  48.     printf("周囲の長さ:%.2f\n",circumference);
  49.  
  50.     return 0;
  51. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
0
0
1
1
stdout 
左上隅の座標を入力してください
X座標を入力:Y座標を入力:
右下隅の座標を入力してください
X座標を入力:Y座標を入力:
面積:1.00
周囲の長さ:4.00
https://ideone.com/AuYn3M
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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