1005 spell it right (20 points) "PTA class a exercise"

Pay attention to 0 In special circumstances

AC Code ：

#include <cstring>
#include <cstdio>
#include <iostream>
#include <algorithm>
#include <unordered_map>
#define dd double
#define PII pair<int,int>
#define int long long
#define ll long long
using namespace std;
const dd eps = 1e-6;
const int mod = 998244353;
const int N = 1e5+10;

string a;
char b[N];
int tot;
signed main()
{
	cin>>a;
	int ans = 0;
	int len = a.length();
	for(int i=0;i<len;i++)
	{
		ans += a[i] - '0';
	}
	while(ans!=0)
	{
		int m = ans % 10;
		b[++tot]='0'+m;
		ans /= 10;
	}
	int ddd=1;
	for(int i=tot;i>=1;i--)
	{
		if(b[i]=='0') printf("zero");
		if(b[i]=='1') printf("one");
		if(b[i]=='2') printf("two");
		if(b[i]=='3') printf("three");
		if(b[i]=='4') printf("four");
		if(b[i]=='5') printf("five");
		if(b[i]=='6') printf("six");
		if(b[i]=='7') printf("seven");
		if(b[i]=='8') printf("eight");
		if(b[i]=='9') printf("nine");
		if(i!=1) printf(" ");
		ddd=0;
	}
	if(a[0]=='0'&&ddd==1) printf("zero");
	return 0;
}