华为OJ基础题-学英语

essi初学英语，为了快速读出一串数字，编写程序将数字转换成英文：

如22：twenty two，123：one hundred and twenty three。

知识点：递归；数组

全局变量：

string Num[10] = { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };
string ShiJi[10] = { "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "eighteen" };
string JiShi[10] = { "ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" };

程序主体：

void funa(int x){

	if (x > 10 && x < 20){ x=x-11; cout << ShiJi[x] << " "; }
	else if (x < 10)cout << Num[x]<<" ";
	else if (x==10){
		cout << JiShi[0] << " ";
	}
	if (x>=20 && x < 100){
		int q = x / 10;
		cout << JiShi[q - 1] << " ";
		x = x% 10;
		if (x == 0)cout << "";
		else{ cout << Num[x] << " "; }
	}
	if (x>=100&&x < 1000){
		if (x % 100 == 0){
			funa(x / 100); cout << "hundred" << " ";
		}
		else{
			funa(x / 100); cout << "hundred and "; funa(x % 100);
		}
	}
	if (x >= 1000 && x < 1000000){
		if (x / 1000 == 0){ funa(x / 1000); cout << "thousand "; }
		else{
			funa(x / 1000); cout << "thousand "; funa(x % 1000);
		}
	}
	if (x >= 1000000 && x < 1000000000){
		if (x / 1000000 == 0){ funa(x / 1000000); cout << "million "; }
		else{
			funa(x / 1000000); cout << "million "; funa(x % 1000000);
		}
	}
}
void HWoj(){
	int x = 0;
	cin >> x;
	if (x == 0)cout << "zero";
	else
		funa(x);
	cout << endl;
}