1002. 写出这个数

#include<iostream>
#include<vector>
#include<iomanip>
#include<string>//g++改为<string.h>
using namespace std;

int main()
{

string str;
int i = 0;
vector<int>numbers;
int num;
long int sum = 0;
cin >> str;
int length = strlen(str.c_str());
while (i < length)
{
num = str[i] - 48;
numbers.push_back(num);
i++;
}
int j = numbers.size() - 1;
for (; j >= 0; --j)
sum += numbers[j];
int summary = sum;
vector<int>vec;
int val, count = 0;
while (sum > 1 || sum == 1)
{
val = sum % 10;
vec.push_back(val);
sum = sum / 10;
count++;
}
int p = vec.size() - 1;
if (summary % 10 == 0 && summary != 0)
{
switch (vec[p])
{
case 1:
cout << "yi";
break;
case 2:
cout << "er";
break;
case 3:
cout << "san";
break;
case 4:
cout << "si";
break;
break;
case 5:
cout << "wu";
break;
case 6:
cout << "liu";
break;
case 7:
cout << "qi";
break;
case 8:
cout << "ba";
break;
case 9:
cout << "jiu";
break;
}
if (p != 0)
cout << " ";
--p;
for (int k = 1; k < count; ++k)
{
cout << "ling";
if (k != count - 1)
cout << " ";
}
return 0;
}
if (summary == 0)
{
cout << "ling";
return 0;
}
j = vec.size() - 1;
while (j >= 0)
{
switch (vec[j])
{
case 1:
cout << "yi";
break;
case 2:
cout << "er";
break;
case 3:
cout << "san";
break;
case 4:
cout << "si";
break;
break;
case 5:
cout << "wu";
break;
case 6:
cout << "liu";
break;
case 7:
cout << "qi";
break;
case 8:
cout << "ba";
break;
case 9:
cout << "jiu";
break;
}
if (j != 0)
cout << " ";
--j;
}
system("pause");
return 0;
}