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