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：

1 2 3 4 5 ……

I II III IV V ……

*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>

int 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