程序代码如下：
#include"stdio.h"
#include"string.h"
#include"windows.h"
#include"ctype.h"
#include"stdlib.h"

int main()
{
    int count = 0;
    char number[5];
    char enumber[9][6] = {"One","Two","Three","Four","Five","Six" ,"Seven","Eight","Nine"};
    char bnumber[11][11] = {"Ten","Eleven","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen","Twenty"};
    char cnumber[10][9] = {"Twenty","Thirty","Fouty","Tifty","Sixty","Seventy","Eighty","Ninty"};
    int s;
    char anwser;
   
   
   
   
   while(1)
   {
    printf("请输入一个1000的正整数：\n");
    scanf("%5s",number);
   
    count = strlen(number);
   
   
   
   
    if(number[0]=='0')                     //检查机制
      {
        printf("error");
        return 1;
        }
    for(int i=0;count>i;i++)               //检查机制
    {
            if(isdigit(number[i])==0)
               {
                   printf("error!");
                   system("pause");
                   return 1;
                }
    }                                 
   
   
   
    if(count==1)                        //是否为一位
    {
      s = atoi(number);
      printf("%s\n\n",enumber[s-1]);
    }      
    if(count==2)                       //是否为两位
    {
      s = atoi(number);
      if(s>=10&&s<=20)
        printf("%s\n\n",s%10==0?(s==20?bnumber[10]:bnumber[0]):bnumber[s%10]);
      else
        printf("%s %s\n\n",cnumber[s/10-2],s%10==0?"":enumber[(s%10)-1]);  
      }
      
     printf("输入N/n结束程序：");
     scanf("%1c",anwser);
     if(toupper(anwser)=='N')
       break;
}   

system("pause");
return 0;
                  
}
编译运行这个程序后，会自己强制结束，说出现问题，停止工作。问题截图在附件中
[附件]问题截图[/附件]