fork download 
  1. package oop.asg02;
  2.  
  3. import java.io.IOException;
  4.  
  5. public class BigInteger
  6. {
  7. 	private String s;
  8.     public BigInteger(long init) {
  9.         s = String.valueOf(init);
  10.     }
  11.  
  12.     public BigInteger(String init) throws IOException {
  13.     	if (init == "") 
  14. 			s = "0";
  15. 		else s = init;
  16.     	while (s.charAt (0) == '0' && s.length() > 1) 
  17. 			s = s.substring (1);
  18. 		for(int i=0; i<init.length(); i++){
  19. 			if(init.charAt(i)< '0' | init.charAt(i)> '9'){
  20. 				throw new IOException ();
  21.     		}
  22.     	}
  23.     }
  24.  
  25.     public String toString() {
  26. 		return s;
  27.     }
  28.  
  29.     public boolean equals(Object other) {
  30. 		return toString().equals(other.toString());
  31.     }
  32.  
  33.     public long toLong() {
  34.         return Long.parseLong(s);  
  35.     }
  36.  
  37. 	public BigInteger add(BigInteger other)throws IOException {	
  38. 		while(this.s.length()>other.s.length()){
  39. 			other.s = "0" + other.s;
  40. 		}
  41. 		while(this.s.length()<other.s.length()){
  42. 			s = "0" + s;
  43. 		}
  44.  
  45. 		String result = "";
  46. 		int remember = 0, temp = 0;
  47.  
  48. 		for(int i = s.length()- 1;i >= 0;i--){		
  49. 			temp = (int)(s.charAt(i)-'0') + (int)(other.s.charAt(i)-'0')  + remember;
  50. 			if(temp >=10){
  51. 				temp = temp % 10;
  52. 				remember = 1;
  53. 			}
  54. 			else{
  55. 				remember = 0;
  56. 			}
  57. 			result = Integer.toString(temp) + result;
  58. 		}
  59. 		if(remember == 1){
  60. 			result = '1' + result ;
  61. 		}
  62. 		return new BigInteger(result);
  63. 	}
  64. 	public int compareTo(BigInteger other){
  65. 		if(this.s.length() < other.s.length())
  66. 			return -1;
  67. 		if(this.s.length() > other.s.length())
  68. 			return 1;
  69. 		if(this.s.length() == other.s.length()){
  70. 			for(int i=0; i<this.s.length(); i++){
  71. 				if(this.s.charAt(i) < other.s.charAt(i))
  72. 					return -1;
  73. 				if(this.s.charAt(i) > other.s.charAt(i))
  74. 					return 1;
  75. 			}
  76. 		}
  77. 		return 0;
  78. 	}
  79.  
  80. 	public BigInteger subtract(BigInteger other)throws IOException {
  81. 		int remember = 0;
  82. 		int temp = 0;
  83. 		String result = new String ();
  84. 		while(this.s.length()>other.s.length()){
  85. 			other.s = "0" + other.s;
  86. 		}
  87. 		while(this.s.length()<other.s.length()){
  88. 			s = "0" + s;
  89. 		}
  90. 		BigInteger s1 = new BigInteger(s);
  91. 		if(s1.compareTo(other)==1 || s1.compareTo(other)==0)
  92. 		{
  93. 			for(int i = s.length()- 1;i >= 0;i--){		
  94. 					temp = (int)(this.s.charAt(i))-'0' - ((int)(other.s.charAt(i))-'0' + remember);
  95. 					if(temp <0)
  96. 					{
  97. 						temp = (int)(this.s.charAt(i))-'0' + 10 - ((int)(other.s.charAt(i))-'0' + remember);
  98. 						remember = 1;
  99. 					}
  100. 					else{
  101. 						remember=0;
  102. 					}
  103. 					result = Integer.toString(temp) + result;
  104. 				}
  105. 				return new BigInteger(result);
  106. 		}
  107. 		else{
  108. 			for(int i = s.length()- 1;i >= 0;i--){		
  109. 				temp = (int)(other.s.charAt(i))-'0' - ((int)(this.s.charAt(i))-'0' + remember);
  110. 				if(temp <0)
  111. 				{
  112. 					temp = (int)(other.s.charAt(i))-'0' + 10 - ((int)(this.s.charAt(i))-'0' + remember);
  113. 					remember = 1;
  114. 				}
  115. 				else{
  116. 					remember=0;
  117. 				}
  118. 				result = Integer.toString(temp) + result;
  119. 			}
  120. 			return new BigInteger("-" + result);
  121.  
  122. 		}
  123. 	}
  124. 	public BigInteger clone(){
  125. 		BigInteger init = null;
  126. 		try{
  127. 			init = new BigInteger(s);
  128. 		} catch (IOException e){
  129. 			System.out.println("day co ki tu char!");
  130. 		}
  131. 		return init;
  132. 	}
  133. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
Main.java:5: error: class BigInteger is public, should be declared in a file named BigInteger.java
public class BigInteger
       ^
1 error
stdout 
Standard output is empty
https://ideone.com/otClJP
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!