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Commit5d59a2e

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219 files changed

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‎Conversions/AnyBaseToAnyBase.java‎

Lines changed: 102 additions & 110 deletions
Original file line numberDiff line numberDiff line change
@@ -6,130 +6,122 @@
66
importjava.util.Scanner;
77

88
/**
9-
* Class for converting from "any" base to "any" other base, when "any" means from 2-36.
10-
*Works bygoing from base 1 to decimal to base 2. Includes auxiliary method for
11-
*determining whether anumber is valid for a given base.
9+
* Class for converting from "any" base to "any" other base, when "any" means from 2-36. Works by
10+
* going from base 1 to decimal to base 2. Includes auxiliary method for determining whether a
11+
* number is valid for a given base.
1212
*
1313
* @author Michael Rolland
1414
* @version 2017.10.10
1515
*/
1616
publicclassAnyBaseToAnyBase {
1717

18-
/**
19-
* Smallest and largest base you want to accept as valid input
20-
*/
21-
staticfinalintMINIMUM_BASE =2;
22-
staticfinalintMAXIMUM_BASE =36;
18+
/** Smallest and largest base you want to accept as valid input */
19+
staticfinalintMINIMUM_BASE =2;
2320

24-
publicstaticvoidmain(String[]args) {
25-
Scannerin =newScanner(System.in);
26-
Stringn;
27-
intb1,b2;
28-
while (true) {
29-
try {
30-
System.out.print("Enter number: ");
31-
n =in.next();
32-
System.out.print("Enter beginning base (between " +MINIMUM_BASE +" and " +MAXIMUM_BASE +"): ");
33-
b1 =in.nextInt();
34-
if (b1 >MAXIMUM_BASE ||b1 <MINIMUM_BASE) {
35-
System.out.println("Invalid base!");
36-
continue;
37-
}
38-
if (!validForBase(n,b1)) {
39-
System.out.println("The number is invalid for this base!");
40-
continue;
41-
}
42-
System.out.print("Enter end base (between " +MINIMUM_BASE +" and " +MAXIMUM_BASE +"): ");
43-
b2 =in.nextInt();
44-
if (b2 >MAXIMUM_BASE ||b2 <MINIMUM_BASE) {
45-
System.out.println("Invalid base!");
46-
continue;
47-
}
48-
break;
49-
}catch (InputMismatchExceptione) {
50-
System.out.println("Invalid input.");
51-
in.next();
52-
}
21+
staticfinalintMAXIMUM_BASE =36;
22+
23+
publicstaticvoidmain(String[]args) {
24+
Scannerin =newScanner(System.in);
25+
Stringn;
26+
intb1,b2;
27+
while (true) {
28+
try {
29+
System.out.print("Enter number: ");
30+
n =in.next();
31+
System.out.print(
32+
"Enter beginning base (between " +MINIMUM_BASE +" and " +MAXIMUM_BASE +"): ");
33+
b1 =in.nextInt();
34+
if (b1 >MAXIMUM_BASE ||b1 <MINIMUM_BASE) {
35+
System.out.println("Invalid base!");
36+
continue;
37+
}
38+
if (!validForBase(n,b1)) {
39+
System.out.println("The number is invalid for this base!");
40+
continue;
5341
}
54-
System.out.println(base2base(n,b1,b2));
55-
in.close();
42+
System.out.print(
43+
"Enter end base (between " +MINIMUM_BASE +" and " +MAXIMUM_BASE +"): ");
44+
b2 =in.nextInt();
45+
if (b2 >MAXIMUM_BASE ||b2 <MINIMUM_BASE) {
46+
System.out.println("Invalid base!");
47+
continue;
48+
}
49+
break;
50+
}catch (InputMismatchExceptione) {
51+
System.out.println("Invalid input.");
52+
in.next();
53+
}
5654
}
55+
System.out.println(base2base(n,b1,b2));
56+
in.close();
57+
}
5758

58-
/**
59-
* Checks if a number (as a String) is valid for a given base.
60-
*/
61-
publicstaticbooleanvalidForBase(Stringn,intbase) {
62-
char[]validDigits = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E',
63-
'F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V',
64-
'W','X','Y','Z'};
65-
// digitsForBase contains all the valid digits for the base given
66-
char[]digitsForBase =Arrays.copyOfRange(validDigits,0,base);
59+
/** Checks if a number (as a String) is valid for a given base. */
60+
publicstaticbooleanvalidForBase(Stringn,intbase) {
61+
char[]validDigits = {
62+
'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I',
63+
'J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
64+
};
65+
// digitsForBase contains all the valid digits for the base given
66+
char[]digitsForBase =Arrays.copyOfRange(validDigits,0,base);
6767

68-
// Convert character array into set for convenience of contains() method
69-
HashSet<Character>digitsList =newHashSet<>();
70-
for (inti =0;i <digitsForBase.length;i++)
71-
digitsList.add(digitsForBase[i]);
68+
// Convert character array into set for convenience of contains() method
69+
HashSet<Character>digitsList =newHashSet<>();
70+
for (inti =0;i <digitsForBase.length;i++)digitsList.add(digitsForBase[i]);
7271

73-
// Check that every digit in n is within the list of valid digits for that base.
74-
for (charc :n.toCharArray())
75-
if (!digitsList.contains(c))
76-
returnfalse;
72+
// Check that every digit in n is within the list of valid digits for that base.
73+
for (charc :n.toCharArray())if (!digitsList.contains(c))returnfalse;
7774

78-
returntrue;
79-
}
75+
returntrue;
76+
}
8077

81-
/**
82-
* Method to convert any integer from base b1 to base b2. Works by converting from b1 to decimal,
83-
* then decimal to b2.
84-
*
85-
* @param n The integer to be converted.
86-
* @param b1 Beginning base.
87-
* @param b2 End base.
88-
* @return n in base b2.
89-
*/
90-
publicstaticStringbase2base(Stringn,intb1,intb2) {
91-
// Declare variables: decimal value of n,
92-
// character of base b1, character of base b2,
93-
// and the string that will be returned.
94-
intdecimalValue =0,charB2;
95-
charcharB1;
96-
Stringoutput ="";
97-
// Go through every character of n
98-
for (inti =0;i <n.length();i++) {
99-
// store the character in charB1
100-
charB1 =n.charAt(i);
101-
// if it is a non-number, convert it to a decimal value >9 and store it in charB2
102-
if (charB1 >='A' &&charB1 <='Z')
103-
charB2 =10 + (charB1 -'A');
104-
// Else, store the integer value in charB2
105-
else
106-
charB2 =charB1 -'0';
107-
// Convert the digit to decimal and add it to the
108-
// decimalValue of n
109-
decimalValue =decimalValue *b1 +charB2;
110-
}
78+
/**
79+
* Method to convert any integer from base b1 to base b2. Works by converting from b1 to decimal,
80+
* then decimal to b2.
81+
*
82+
* @param n The integer to be converted.
83+
* @param b1 Beginning base.
84+
* @param b2 End base.
85+
* @return n in base b2.
86+
*/
87+
publicstaticStringbase2base(Stringn,intb1,intb2) {
88+
// Declare variables: decimal value of n,
89+
// character of base b1, character of base b2,
90+
// and the string that will be returned.
91+
intdecimalValue =0,charB2;
92+
charcharB1;
93+
Stringoutput ="";
94+
// Go through every character of n
95+
for (inti =0;i <n.length();i++) {
96+
// store the character in charB1
97+
charB1 =n.charAt(i);
98+
// if it is a non-number, convert it to a decimal value >9 and store it in charB2
99+
if (charB1 >='A' &&charB1 <='Z')charB2 =10 + (charB1 -'A');
100+
// Else, store the integer value in charB2
101+
elsecharB2 =charB1 -'0';
102+
// Convert the digit to decimal and add it to the
103+
// decimalValue of n
104+
decimalValue =decimalValue *b1 +charB2;
105+
}
111106

112-
// Converting the decimal value to base b2:
113-
// A number is converted from decimal to another base
114-
// by continuously dividing by the base and recording
115-
// the remainder until the quotient is zero. The number in the
116-
// new base is the remainders, with the last remainder
117-
// being the left-most digit.
118-
if (0 ==decimalValue)
119-
return"0";
120-
// While the quotient is NOT zero:
121-
while (decimalValue !=0) {
122-
// If the remainder is a digit < 10, simply add it to
123-
// the left side of the new number.
124-
if (decimalValue %b2 <10)
125-
output =Integer.toString(decimalValue %b2) +output;
126-
// If the remainder is >= 10, add a character with the
127-
// corresponding value to the new number. (A = 10, B = 11, C = 12, ...)
128-
else
129-
output = (char) ((decimalValue %b2) +55) +output;
130-
// Divide by the new base again
131-
decimalValue /=b2;
132-
}
133-
returnoutput;
107+
// Converting the decimal value to base b2:
108+
// A number is converted from decimal to another base
109+
// by continuously dividing by the base and recording
110+
// the remainder until the quotient is zero. The number in the
111+
// new base is the remainders, with the last remainder
112+
// being the left-most digit.
113+
if (0 ==decimalValue)return"0";
114+
// While the quotient is NOT zero:
115+
while (decimalValue !=0) {
116+
// If the remainder is a digit < 10, simply add it to
117+
// the left side of the new number.
118+
if (decimalValue %b2 <10)output =Integer.toString(decimalValue %b2) +output;
119+
// If the remainder is >= 10, add a character with the
120+
// corresponding value to the new number. (A = 10, B = 11, C = 12, ...)
121+
elseoutput = (char) ((decimalValue %b2) +55) +output;
122+
// Divide by the new base again
123+
decimalValue /=b2;
134124
}
125+
returnoutput;
126+
}
135127
}

‎Conversions/AnyBaseToDecimal.java‎

Lines changed: 40 additions & 42 deletions
Original file line numberDiff line numberDiff line change
@@ -1,53 +1,51 @@
11
packageConversions;
22

3-
/**
4-
* @author Varun Upadhyay (https://github.com/varunu28)
5-
*/
3+
/** @author Varun Upadhyay (https://github.com/varunu28) */
64

75
// Driver program
86
publicclassAnyBaseToDecimal {
9-
publicstaticvoidmain(String[]args) {
10-
assertconvertToDecimal("1010",2) ==Integer.valueOf("1010",2);
11-
assertconvertToDecimal("777",8) ==Integer.valueOf("777",8);
12-
assertconvertToDecimal("999",10) ==Integer.valueOf("999",10);
13-
assertconvertToDecimal("ABCDEF",16) ==Integer.valueOf("ABCDEF",16);
14-
assertconvertToDecimal("XYZ",36) ==Integer.valueOf("XYZ",36);
15-
}
7+
publicstaticvoidmain(String[]args) {
8+
assertconvertToDecimal("1010",2) ==Integer.valueOf("1010",2);
9+
assertconvertToDecimal("777",8) ==Integer.valueOf("777",8);
10+
assertconvertToDecimal("999",10) ==Integer.valueOf("999",10);
11+
assertconvertToDecimal("ABCDEF",16) ==Integer.valueOf("ABCDEF",16);
12+
assertconvertToDecimal("XYZ",36) ==Integer.valueOf("XYZ",36);
13+
}
1614

17-
/**
18-
* Convert any radix to decimal number
19-
*
20-
* @param s the string to be convert
21-
* @param radix the radix
22-
* @return decimal of bits
23-
* @throws NumberFormatException if {@code bits} or {@code radix} is invalid
24-
*/
25-
publicstaticintconvertToDecimal(Strings,intradix) {
26-
intnum =0;
27-
intpow =1;
15+
/**
16+
* Convert any radix to decimal number
17+
*
18+
* @param s the string to be convert
19+
* @param radix the radix
20+
* @return decimal of bits
21+
* @throws NumberFormatException if {@code bits} or {@code radix} is invalid
22+
*/
23+
publicstaticintconvertToDecimal(Strings,intradix) {
24+
intnum =0;
25+
intpow =1;
2826

29-
for (inti =s.length() -1;i >=0;i--) {
30-
intdigit =valOfChar(s.charAt(i));
31-
if (digit >=radix) {
32-
thrownewNumberFormatException("For input string " +s);
33-
}
34-
num +=valOfChar(s.charAt(i)) *pow;
35-
pow *=radix;
36-
}
37-
returnnum;
27+
for (inti =s.length() -1;i >=0;i--) {
28+
intdigit =valOfChar(s.charAt(i));
29+
if (digit >=radix) {
30+
thrownewNumberFormatException("For input string " +s);
31+
}
32+
num +=valOfChar(s.charAt(i)) *pow;
33+
pow *=radix;
3834
}
35+
returnnum;
36+
}
3937

40-
/**
41-
* Convert character to integer
42-
*
43-
* @param c the character
44-
* @return represented digit of given character
45-
* @throws NumberFormatException if {@code ch} is not UpperCase or Digit character.
46-
*/
47-
publicstaticintvalOfChar(charc) {
48-
if (!(Character.isUpperCase(c) ||Character.isDigit(c))) {
49-
thrownewNumberFormatException("invalid character :" +c);
50-
}
51-
returnCharacter.isDigit(c) ?c -'0' :c -'A' +10;
38+
/**
39+
* Convert character to integer
40+
*
41+
* @param c the character
42+
* @return represented digit of given character
43+
* @throws NumberFormatException if {@code ch} is not UpperCase or Digit character.
44+
*/
45+
publicstaticintvalOfChar(charc) {
46+
if (!(Character.isUpperCase(c) ||Character.isDigit(c))) {
47+
thrownewNumberFormatException("invalid character :" +c);
5248
}
49+
returnCharacter.isDigit(c) ?c -'0' :c -'A' +10;
50+
}
5351
}

‎Conversions/AnytoAny.java‎

Lines changed: 22 additions & 22 deletions
Original file line numberDiff line numberDiff line change
@@ -1,30 +1,30 @@
11
packageConversions;
22

33
importjava.util.Scanner;
4-
//given a source number , source base, destination base, this code can give you the destination number.
5-
//sn ,sb,db ---> ()dn . this is what we have to do .
4+
// given a source number , source base, destination base, this code can give you the destination
5+
// number.
6+
// sn ,sb,db ---> ()dn . this is what we have to do .
67

78
publicclassAnytoAny {
89

9-
publicstaticvoidmain(String[]args) {
10-
Scannerscn =newScanner(System.in);
11-
intsn =scn.nextInt();
12-
intsb =scn.nextInt();
13-
intdb =scn.nextInt();
14-
intm =1,dec =0,dn =0;
15-
while (sn !=0) {
16-
dec =dec + (sn %10) *m;
17-
m *=sb;
18-
sn /=10;
19-
}
20-
m =1;
21-
while (dec !=0) {
22-
dn =dn + (dec %db) *m;
23-
m *=10;
24-
dec /=db;
25-
}
26-
System.out.println(dn);
27-
scn.close();
10+
publicstaticvoidmain(String[]args) {
11+
Scannerscn =newScanner(System.in);
12+
intsn =scn.nextInt();
13+
intsb =scn.nextInt();
14+
intdb =scn.nextInt();
15+
intm =1,dec =0,dn =0;
16+
while (sn !=0) {
17+
dec =dec + (sn %10) *m;
18+
m *=sb;
19+
sn /=10;
2820
}
29-
21+
m =1;
22+
while (dec !=0) {
23+
dn =dn + (dec %db) *m;
24+
m *=10;
25+
dec /=db;
26+
}
27+
System.out.println(dn);
28+
scn.close();
29+
}
3030
}

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