指定された数値を単語に変換する C/C++/Java コードを記述します。
例:- 入力: 1234
出力: 1234。
入力: 10
出力: 10
0 から 10 までの完全なスイッチ ケースが必要ですか。
14 から 19 までのすべての数字の名前の後に「teen」を追加します (例: 14: four "teen".)。
さらに、「ty」と 20 から 99 の範囲の数字の数字の名前を追加するよりも。
等々。
これを解決するには、はるかに優れたアプローチが必要だと思います。
Cコードが望ましいです。
#include<iostream>
using namespace std;
void expand(int);
int main()
{
int num;
cout<<"Enter a number : ";
cin>>num;
expand(num);
}
void expand(int value)
{
const char * const ones[20] = {"zero", "one", "two", "three","four","five","six","seven",
"eight","nine","ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen",
"eighteen","nineteen"};
const char * const tens[10] = {"", "ten", "twenty", "thirty","forty","fifty","sixty","seventy",
"eighty","ninety"};
if(value<0)
{
cout<<"minus ";
expand(-value);
}
else if(value>=1000)
{
expand(value/1000);
cout<<" thousand";
if(value % 1000)
{
if(value % 1000 < 100)
{
cout << " and";
}
cout << " " ;
expand(value % 1000);
}
}
else if(value >= 100)
{
expand(value / 100);
cout<<" hundred";
if(value % 100)
{
cout << " and ";
expand (value % 100);
}
}
else if(value >= 20)
{
cout << tens[value / 10];
if(value % 10)
{
cout << " ";
expand(value % 10);
}
}
else
{
cout<<ones[value];
}
return;
}
switchステートメントの代わりに、小さな値でインデックス付けされた文字列のテーブルを使用することを検討してください。
const char * const ones[20] = {"zero", "one", "two", ..., "nineteen"};
const char * const tens[10] = {"", "ten", "twenty", ..., "ninety"};
ここで、問題を細かく分割します。1桁の数値を出力できる関数を記述します。次に、2桁の数値を処理できる関数を記述します（おそらく前の関数を使用します）。必要に応じて機能を構築し続けます。
期待される出力を含むテストケースのリストを作成し、関数を呼び出して出力を確認するコードを記述します。これにより、より複雑なケースの問題を修正するときに、より単純なケースが引き続き機能することを確認できます。
0～999999999の任意の数値で機能します。
このプログラムは、ユーザーから数値を取得し、それを 3 つの部分に分割して、配列に別々に格納します。3 つの数値は、それらを単語に変換する関数を介して渡されます。次に、最初の部分に "million" を追加し、2 番目の部分に "thousand" を追加します。
#include <iostream>
using namespace std;
int buffer = 0, partFunc[3] = {0, 0, 0}, part[3] = {0, 0, 0}, a, b, c, d;
long input, nFake = 0;
const char ones[][20] = {"", "one", "two", "three",
"four", "five", "six", "seven",
"eight", "nine", "ten", "eleven",
"twelve", "thirteen", "fourteen", "fifteen",
"sixteen", "seventeen", "eighteen", "nineteen"};
const char tens[][20] = {"", "ten", "twenty", "thirty", "forty",
"fifty", "sixty", "seventy", "eighty", "ninety"};
void convert(int funcVar);
int main() {
cout << "Enter the number:";
cin >> input;
nFake = input;
buffer = 0;
while (nFake) {
part[buffer] = nFake % 1000;
nFake /= 1000;
buffer++;
}
if (buffer == 0) {
cout << "Zero.";
} else if (buffer == 1) {
convert(part[0]);
} else if (buffer == 2) {
convert(part[1]);
cout << " thousand,";
convert(part[0]);
} else {
convert(part[2]);
cout << " million,";
if (part[1]) {
convert(part[1]);
cout << " thousand,";
} else {
cout << "";
}
convert(part[0]);
}
system("pause");
return (0);
}
void convert(int funcVar) {
buffer = 0;
if (funcVar >= 100) {
a = funcVar / 100;
b = funcVar % 100;
if (b)
cout << " " << ones[a] << " hundred and";
else
cout << " " << ones[a] << " hundred ";
if (b < 20)
cout << " " << ones[b];
else {
c = b / 10;
cout << " " << tens[c];
d = b % 10;
cout << " " << ones[d];
}
} else {
b = funcVar;
if (b < 20)
cout << ones[b];
else {
c = b / 10;
cout << tens[c];
d = b % 10;
cout << " " << ones[d];
}
}
}
/* This Program will convert Numbers from -999,999,999 to 999,999,999 into words */
#include <vector>
#include <iostream>
#include <stdexcept>
#include <string>
using namespace std;
const std::vector<std::string> first14 = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen" };
const std::vector<std::string> prefixes = { "twen", "thir", "for", "fif", "six", "seven", "eigh", "nine" };
std::string inttostr(const int number)
{
if (number < 0)
{
return "minus " + inttostr(-number);
}
if (number <= 14)
return first14.at(number);
if (number < 20)
return prefixes.at(number - 12) + "teen";
if (number < 100) {
unsigned int remainder = number - (static_cast<int>(number / 10) * 10);
return prefixes.at(number / 10 - 2) + (0 != remainder ? "ty " + inttostr(remainder) : "ty");
}
if (number < 1000) {
unsigned int remainder = number - (static_cast<int>(number / 100) * 100);
return first14.at(number / 100) + (0 != remainder ? " hundred " + inttostr(remainder) : " hundred");
}
if (number < 1000000) {
unsigned int thousands = static_cast<int>(number / 1000);
unsigned int remainder = number - (thousands * 1000);
return inttostr(thousands) + (0 != remainder ? " thousand " + inttostr(remainder) : " thousand");
}
if (number < 1000000000) {
unsigned int millions = static_cast<int>(number / 1000000);
unsigned int remainder = number - (millions * 1000000);
return inttostr(millions) + (0 != remainder ? " million " + inttostr(remainder) : " million");
}
throw std::out_of_range("inttostr() value too large");
}
int main()
{
int num;
cout << "Enter a number to convert it into letters : ";
cin >> num;
cout << endl << num << " = " << inttostr(num) << endl;
system("pause");
return 0;
}
/*Maximum value that can be entered is 2,147,483,647
* Program to convert entered number into string
* */
import java.util.Scanner;
public class NumberToWords
{
public static void main(String[] args)
{
double num;//for taking input number
Scanner obj=new Scanner(System.in);
do
{
System.out.println("\n\nEnter the Number (Maximum value that can be entered is 2,147,483,647)");
num=obj.nextDouble();
if(num<=2147483647)//checking if entered number exceeds maximum integer value
{
int number=(int)num;//type casting double number to integer number
splitNumber(number);//calling splitNumber-it will split complete number in pairs of 3 digits
}
else
System.out.println("Enter smaller value");//asking user to enter a smaller value compared to 2,147,483,647
}while(num>2147483647);
}
//function to split complete number into pair of 3 digits each
public static void splitNumber(int number)
{ //splitNumber array-contains the numbers in pair of 3 digits
int splitNumber[]=new int[4],temp=number,i=0,index;
//splitting number into pair of 3
if(temp==0)
System.out.println("zero");
while(temp!=0)
{
splitNumber[i++]=temp%1000;
temp/=1000;
}
//passing each pair of 3 digits to another function
for(int j=i-1;j>-1;j--)
{ //toWords function will split pair of 3 digits to separate digits
if(splitNumber[j]!=0)
{toWords(splitNumber[j]);
if(j==3)//if the number contained more than 9 digits
System.out.print("billion,");
else if(j==2)//if the number contained more than 6 digits & less than 10 digits
System.out.print("million,");
else if(j==1)
System.out.print("thousand,");//if the number contained more than 3 digits & less than 7 digits
}
}
}
//function that splits number into individual digits
public static void toWords(int number)
//splitSmallNumber array contains individual digits of number passed to this function
{ int splitSmallNumber[]=new int[3],i=0,j;
int temp=number;//making temporary copy of the number
//logic to split number into its constituent digits
while(temp!=0)
{
splitSmallNumber[i++]=temp%10;
temp/=10;
}
//printing words for each digit
for(j=i-1;j>-1;j--)
//{ if the digit is greater than zero
if(splitSmallNumber[j]>=0)
//if the digit is at 3rd place or if digit is at (1st place with digit at 2nd place not equal to zero)
{ if(j==2||(j==0 && (splitSmallNumber[1]!=1)))
{
switch(splitSmallNumber[j])
{
case 1:System.out.print("one ");break;
case 2:System.out.print("two ");break;
case 3:System.out.print("three ");break;
case 4:System.out.print("four ");break;
case 5:System.out.print("five ");break;
case 6:System.out.print("six ");break;
case 7:System.out.print("seven ");break;
case 8:System.out.print("eight ");break;
case 9:System.out.print("nine ");break;
}
}
//if digit is at 2nd place
if(j==1)
{ //if digit at 2nd place is 0 or 1
if(((splitSmallNumber[j]==0)||(splitSmallNumber[j]==1))&& splitSmallNumber[2]!=0 )
System.out.print("hundred ");
switch(splitSmallNumber[1])
{ case 1://if digit at 2nd place is 1 example-213
switch(splitSmallNumber[0])
{
case 1:System.out.print("eleven ");break;
case 2:System.out.print("twelve ");break;
case 3:System.out.print("thirteen ");break;
case 4:System.out.print("fourteen ");break;
case 5:System.out.print("fifteen ");break;
case 6:System.out.print("sixteen ");break;
case 7:System.out.print("seventeen ");break;
case 8:System.out.print("eighteen ");break;
case 9:System.out.print("nineteen ");break;
case 0:System.out.print("ten ");break;
}break;
//if digit at 2nd place is not 1
case 2:System.out.print("twenty ");break;
case 3:System.out.print("thirty ");break;
case 4:System.out.print("forty ");break;
case 5:System.out.print("fifty ");break;
case 6:System.out.print("sixty ");break;
case 7:System.out.print("seventy ");break;
case 8:System.out.print("eighty ");break;
case 9:System.out.print("ninety ");break;
//case 0: System.out.println("hundred ");break;
}
}
}
}
}