用C++用单词表示正整数的程序
假设我们得到一个正整数。我们必须用单词拼写数字；就像如果输入数字“56”，输出将是“56”。转换范围高达十亿。
所以，如果输入像input=5678，那么输出就是五千六百七十八。
示例
让我们看看以下实现以获得更好的理解-
#include<bits/stdc++.h>
using namespace std;
vector<pair<string, int>> numbers{{"Billion", 1000000000},
{"Million", 1000000},
{"Thousand", 1000},
{"Hundred", 100},
{"Ninety", 90},
{"Eighty", 80},
{"Seventy", 70},
{"Sixty", 60},
{"Fifty", 50},
{"Forty", 40},
{"Thirty", 30},
{"Twenty", 20},
{"Nineteen", 19},
{"Eighteen", 18},
{"Seventeen", 17},
{"Sixteen", 16},
{"Fifteen", 15},
{"Fourteen", 14},
{"Thirteen", 13},
{"Twelve", 12},
{"Eleven", 11},
{"Ten", 10},
{"Nine", 9},
{"Eight", 8},
{"Seven", 7},
{"Six", 6},
{"Five", 5},
{"Four", 4},
{"Three", 3},
{"Two", 2},
{"One", 1}};
string solve(int input) {
if (input == 0) return "Zero";
string result;
for (auto& num : numbers) {
if (num.second <= input) {
if (num.second >= 100) {
result = solve(input / num.second) + " " + num.first;
if (input > (input / num.second) * num.second)
result += " " + solve(input - (input / num.second) * num.second);
} else {
result =num.first+ (input >num.second? " " + solve(input - num.second) : "");
}
break;
}
}
return result;
}
int main() {
cout<< solve(5678) <<endl;
return 0;
}输入
5678输出结果
Five Thousand Six Hundred Seventy Eight