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藍橋杯練習(vip) 報時助手

/*問題描述
  給定當前的時間,請用英文的讀法將它讀出來。
  時間用時h和分m表示,在英文的讀法中,讀一個時間的方法是:
  如果m為0,則將時讀出來,然後加上“o'clock”,如3:00讀作“three o'clock”。
  如果m不為0,則將時讀出來,然後將分讀出來,如5:30讀作“five thirty”。
  時和分的讀法使用的是英文數字的讀法,其中0~20讀作:
  0:zero, 1: one, 2:two, 3:three, 4:four, 5:five, 6:six, 7:seven, 8:eight, 9:nine, 10:ten, 11:eleven, 12:twelve, 13:thirteen, 14:fourteen, 15:fifteen, 16:sixteen, 17:seventeen, 18:eighteen, 19:nineteen, 20:twenty。
  30讀作thirty,40讀作forty,50讀作fifty。
  對於大於20小於60的數字,首先讀整十的數,然後再加上個位數。如31首先讀30再加1的讀法,讀作“thirty one”。
  按上面的規則21:54讀作“twenty one fifty four”,9:07讀作“nine seven”,0:15讀作“zero fifteen”。

輸入格式
  輸入包含兩個非負整數h和m,表示時間的時和分。非零的數字前沒有前導0。h小於24,m小於60。

輸出格式
  輸出時間時刻的英文。

樣例輸入
0 15

樣例輸出
zero fifteen
*/

#include<stdio.h>
int main()
{
	char a[21][20]={"zero","one","two","three","four","five","six","seven","eight","nine","ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen","twenty"};
	char b[6][20]={"","","twenty","thirty","forty","fifty"};
	int m,h;
	scanf("%d%d",&h,&m);
	if(m==0)
	{
		if(h<=20)
		 printf("%s o'clock",a[h]);
		else
		 printf("%s %s",b[h/10],a[h%10]);
	}
	else
	{
		if(h<=20)
		{
			if(m<=20)
			{
				printf("%s %s",a[h],a[m]);
			}
			else
			{
				printf("%s %s %s",a[h],b[m/10],a[m%10]);
			}
		}
		else
		{
			if(m<=20)
			{
				printf("%s %s %s",b[h/10],a[h%10],a[m]);
			}
			else
			{
				printf("%s %s %s %s",b[h/10],a[h%10],b[m/10],a[m%10]);
			}
		}
	}
	return 0;
}