1005 Spell It Right(20分)

题目链接1005 Spell It Right

题意

给出字符串，计算每位上的数字之和，然后用英语输出和。

#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <algorithm>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
const int maxn = 110;
void toDigit(int sum);
void change(int mod, char arr[]);
int main(int argc, char** argv) {
	char str[maxn];	
	scanf("%s", str);
	int sum = 0;
	for (int i = 0; i < strlen(str); i++) {
		sum += str[i] - '0';
	}
	toDigit(sum);
	return 0;
}
void toDigit(int sum) {
	char arr[maxn];
	int mod = sum % 10;
	if (sum / 10 ==  0) {
		change(mod, arr);
		printf("%s", arr);
		return ;
	}
	toDigit(sum / 10);
	change(mod, arr);
	printf(" %s", arr);
}
void change(int mod, char arr[]) {
	string str;
	switch (mod) {
		case 0: str = "zero"; break;
		case 1: str = "one"; break;
		case 2: str = "two"; break;
		case 3: str = "three"; break;
		case 4: str = "four"; break;
		case 5: str = "five"; break;
		case 6: str = "six"; break;
		case 7: str = "seven"; break;
		case 8: str = "eight"; break;
		case 9: str = "nine"; break;
	}
	int i;
	for (i = 0; i < str.size(); i++)
		arr[i] = str.at(i);
	arr[i] = '\0';
}