【问题描述】
输入一个正整数N(N最大是4位数),输出它的英文表达。
【样例】
输入:1
输出:one
又输入:12
输出:twelve
右输入:135
输出:one hundred thirty five
思路:1、首先19以内的数字,可以直接输出。。
2、20~~~99以内的数字,整十的整数可以直接输出。否则,除以10输出十位数字,与10取模输出个位数字。
3、100~~~999以内的数字,除以100输出百位数字,与100取模得到一个两位的数字,转到2
4、1000~~~9999以内的数字,除以1000输出千位数字,与1000取模得到一个三位的数字,转到3
完整的实现代码如下:
#include "iostream" using namespace std; char table[20][20]= {"zero","one","two","three","four","five","six","seven","eight","nine","ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","ninteen" }; char tens[12][20]={"","ten","twenty","thirty","forty","fifty","sixty","seventy","eighty","ninty","hundred","thousand" }; void print(int n) { if(n >= 0 && n <= 19) { cout<<table[n]; //直接输出19以内的数字 } else if(n >= 20 && n <= 99 && n%10 == 0) //整十 { cout<<tens[n/10]; } else if(n >= 20 && n <= 99) //先输出十位,再输出个位 { cout<<tens[n/10]<<" "<<table[n%10]; } else if(n >= 100 && n<= 999) { print(n/100); cout<<" "<<tens[10]<<" "; //输出百位 print(n%100); //递归调用,输出十位和个位 } else if(n >= 1000 && n <= 999999) { print(n/1000); cout<<" "<<tens[11]<<" "; //输出千位 print(n%1000); //递归调用,输出百位、十位和个位 } } int main(void) { int n; while(cin>>n) { print(n); cout<<endl; } system("pause"); return 0; }
运行效果图如下: