Repository navigation
Expand file tree
/
Copy pathNumToString.java
More file actions
168 lines (153 loc) · 2.77 KB
/
Copy pathNumToString.java
File metadata and controls
168 lines (153 loc) · 2.77 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
public class NumToString
{
public static void main(String[] args)
{
NumToString x = new NumToString();
int val = 1210;
System.out.println("ANS: " + x.convert(val));
}
public StringBuilder convert(int val)
{
StringBuilder ans = new StringBuilder();
char[] c = Integer.toString(val).toCharArray();
// Go over all the digits
for(int i = 0; i < c.length; i++)
{
// If 10/20/etc, single digit followed by zeroes, don't need to process anymore
for(int j = i; j < c.length; j++)
{
if(c[j] != '0')
break;
if(j == c.length - 1)
return ans;
}
// If it's a teen
if(c.length - i == 2)
{
boolean found = getTeenPlace(c[i], c[i] + "" + c[i+1], ans);
// if we found 11-19, done
if(found)
return ans;
}
else
getDigit(c[i], ans);
// Find the place, ten, hundred, thousand
getPlace(c.length - i, ans);
}
return ans;
}
private boolean getTeenPlace(char v, String c, StringBuilder ans) {
switch(Integer.parseInt(v + ""))
{
case 1:
getTeen(c, ans);
return true;
case 2:
ans.append(" twenty");
return false;
case 3:
ans.append(" thirty");
return false;
case 4:
ans.append(" fourty");
return false;
case 5:
ans.append(" fifty");
return false;
case 6:
ans.append(" sixty");
return false;
case 7:
ans.append(" seventy");
return false;
case 8:
ans.append(" eighty");
return false;
case 9:
ans.append(" ninty");
return false;
}
return false;
}
private void getTeen(String c, StringBuilder ans)
{
switch(Integer.parseInt(c))
{
case 10:
ans.append(" ten");
break;
case 11:
ans.append(" eleven");
break;
case 12:
ans.append(" twelve");
break;
case 13:
ans.append(" thirteen");
break;
case 14:
ans.append(" fourteen");
break;
case 15:
ans.append(" fifteen");
break;
case 16:
ans.append(" sixteen");
break;
case 17:
ans.append(" seventeen");
break;
case 18:
ans.append(" eighteen");
break;
case 19:
ans.append(" nineteen");
break;
}
}
private void getPlace(int i, StringBuilder ans) {
if(i == 4)
{
ans.append(" thousand");
}
else if(i == 3)
{
ans.append(" hundred");
}
}
private void getDigit(char c, StringBuilder ans) {
switch(Integer.parseInt(c + ""))
{
case 0:
ans.append(" zero");
break;
case 1:
ans.append(" one");
break;
case 2:
ans.append(" two");
break;
case 3:
ans.append(" three");
break;
case 4:
ans.append(" four");
break;
case 5:
ans.append(" five");
break;
case 6:
ans.append(" six");
break;
case 7:
ans.append(" seven");
break;
case 8:
ans.append(" eight");
break;
case 9:
ans.append(" nine");
break;
}
}
}