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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. import java.lang.Math.*;
  5.  
  6. class Student{
  7. 	int H;
  8. 	int W;
  9. 	float BMI;
  10. 	String Name;
  11.  
  12. Student(){ //3
  13.     this("Jack",180,68);
  14. 	//H=180;
  15.     //W=68;
  16. 	//Name="Jack";
  17. }
  18.  
  19. Student(int H,int W){ //1
  20. 	this.H=H;
  21. 	this.W=W;
  22. }
  23. Student(String Name,int H,int W){ //2
  24. 	this(H,W);
  25. 	this.Name=Name;
  26. 	//this.H=H;
  27. 	//this.W=W;
  28. }
  29. void setName(String Name){
  30. 	this.Name=Name;
  31. }
  32. void show(){
  33. 	System.out.println("學生:"+Name+",身高:"+H+"公分,體重:"+W+"公斤,BMI:"+BMI);
  34. }
  35. void calculate(){
  36. 	BMI=W/((H/100.0f)*(H/100.0f));
  37. }
  38. void toCompare(Student s){
  39. 	if((H+W)>(s.H+s.W)){
  40. 		System.out.println(Name+"與"+s.Name+"相差"+(H-s.H)+"公分及"+(W-s.W)+"公斤");
  41. 	}
  42. 	else{
  43. 		System.out.println(Math.abs)(Name+"與"+s.Name+"相差"+(s.H-H)+"公分及"+(s.W-W)+"公斤");
  44. 	}
  45.  
  46. }
  47. }
  48.  
  49.  
  50.  
  51. class Ideone
  52. {
  53. 	public static void main (String[] args) throws java.lang.Exception
  54. 	{
  55. 		Student s1 = new Student(173,80);
  56. 		s1.setName("Mary");
  57. 		s1.calculate();
  58. 		//s1.show();
  59.  
  60. 		Student s2 = new Student("Jennifer",167,53);
  61. 		s2.calculate();
  62. 		//s2.show();
  63.  
  64. 		Student s3 = new Student();
  65. 		s3.calculate();
  66. 		//s3.show();
  67.  
  68. 		s1.toCompare(s2);
  69. 		s2.toCompare(s1);
  70. 		s3.toCompare(s1);
  71. 		s2.toCompare(s3);
  72.  
  73. 	}
  74. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:43: error: ';' expected
		System.out.println(Math.abs)(Name+"?"+s.Name+"??"+(s.H-H)+"???"+(s.W-W)+"??");
		                            ^
Main.java:43: error: not a statement
		System.out.println(Math.abs)(Name+"?"+s.Name+"??"+(s.H-H)+"???"+(s.W-W)+"??");
		                                                                       ^
Main.java:43: error: ';' expected
		System.out.println(Math.abs)(Name+"?"+s.Name+"??"+(s.H-H)+"???"+(s.W-W)+"??");
		                                                                            ^
3 errors
stdout
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Standard output is empty
https://ideone.com/oY2XOb
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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