95.将阿拉伯数字转换为罗马数字
   将大于0小于1000的阿拉伯数字转换为罗马数字。阿拉伯数字与罗马数字的对应关系如下：


*问题分析与算法设计
   题目中给出了阿拉伯数字与罗马数字的对应关系，题中的数字转换实际上就是查表翻译。即将整数的百、十、个位依次从整数中分解出来，查找表中相应的行后输出对应的字符。
*程序与程序设计
#include<stdio.h>
void main()
{
   static char *a[][10]={"","I","II","III","IV","V","VI","VII","VIII","IX"
                        "","X","XX","XXX","XL","L","LX","LXX","LXXX","XCC",
                        "","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"
                        };           /*建立对照表*/
   int n,t,i,m;
   printf("Please enter number:");
   scanf("%d",&n);           /*输入整数*/
   printf("%d=",n);
   for(m=0,i=1000;m<3;m++,i/=10)
   {
      t=(n%i)/(i/10);        /*从高位向低位依次取各位的数字*/
      printf("%s",a[2-m][t]);      /*通过对照表翻译输出*/
   }
   printf("\n");
}

*运行结果
   1. Please enter number:863
      863=DCCCLXIII
   2. Please enter number: 256
      256=CCLVI
   3. Please enter number:355
      355=CCCLV
   4. Please enter number:522
      522=DXXII
   5. Please enter number:15
      15=XV

*思考题
   输入正整数N，产生对应的英文数字符串并输出，例如：
      1       ONE      2   TWO      3   THREE
      10      TEN      11  ELEVEN
      135     ONE HUNDRED THIRTY FIVE