1005. Spell It Right

Spell It Right

Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English.

Input Specification:

Each input file contains one test case. Each case occupies one line which contains an N (<= $10^{100}$).

Output Specification:

For each test case, output in one line the digits of the sum in English words. There must be one space between two consecutive words, but no extra space at the end of a line.

Sample Input:

12345

Sample Output:

one five

---

题意

给定一个数，计算各位数之和，并将和的每一位用英文输出。

思路

题目较简单，按步骤操作即可。为了方便起见使用STL模版。

---

代码实现

#include <iostream>
#include <map>
#include <string>
using namespace std;

map<int, string> en;

void createEn()     // 创建map映射表
{
	en[0] = "zero";
	en[1] = "one";
	en[2] = "two";
	en[3] = "three";
	en[4] = "four";
	en[5] = "five";
	en[6] = "six";
	en[7] = "seven";
	en[8] = "eight";
	en[9] = "nine";
}


int sum(string n)   // 计算各位数之和
{
	int ans = 0;
	for (int i = 0; i < n.length(); i++)
		ans += n[i] - '0';
	 return ans;
}

void printEnglish(int n, bool &flag)    // 递归输出结果，flag用于控制空格输出
{
	if (n == 0)
		return;
	printEnglish(n / 10, flag);
	if (flag)
	{
		cout << en[n % 10];
		flag = false;
	}
	else
		cout << " " << en[n % 10];
}

int main()
{
	createEn();
	bool flag = true;       // 控制空格输出
	string n;
	cin >> n;
	if (sum(n) == 0)
		cout << en[0];
	else
		printEnglish(sum(n), flag);
	return 0;
}