超笨写法

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;cin>>n;
	if(n<10){
		if(n==0) cout<<"ling";
		if(n==1) cout<<"yi";
		if(n==2) cout<<"er";
		if(n==3) cout<<"san";
		if(n==4) cout<<"si";
		if(n==5) cout<<"wu";
		if(n==6) cout<<"liu";
		if(n==7) cout<<"qi";
		if(n==8) cout<<"ba";
		if(n==9) cout<<"jiu";
	}else{
		if(n%10==0){
			if(n==10) cout<<"shi";
			if(n==20) cout<<"er shi";
			if(n==30) cout<<"san shi";
			if(n==40) cout<<"si shi";
			if(n==50) cout<<"wu shi";
			if(n==60) cout<<"liu shi";
			if(n==70) cout<<"qi shi";
			if(n==80) cout<<"ba shi";
			if(n==90) cout<<"jiu shi";
		}else{
			int g=n%10;int s=n/10;
			if(s==1) cout<<"shi ";
			if(s==2) cout<<"er shi ";
			if(s==3) cout<<"san shi ";
			if(s==4) cout<<"si shi ";
			if(s==5) cout<<"wu shi ";
			if(s==6) cout<<"liu shi ";
			if(s==7) cout<<"qi shi ";
			if(s==8) cout<<"ba shi ";
			if(s==9) cout<<"jiu shi ";
			if(g==0) cout<<"shi";
			if(g==1) cout<<"yi";
			if(g==2) cout<<"er";
			if(g==3) cout<<"san";
			if(g==4) cout<<"si";
			if(g==5) cout<<"wu";
			if(g==6) cout<<"liu";
			if(g==7) cout<<"qi";
			if(g==8) cout<<"ba";
			if(g==9) cout<<"jiu";
		}
	}
	return 0;
}

已 WA AC，放心食用

#include <bits/stdc++.h> 
using namespace std;
string shift(int n)
{
    if(n == 0)return "ling";
    else if(n == 1)return "yi";
    else if(n == 2)return "er";
    else if(n == 3)return "san";
    else if(n == 4)return "si";
    else if(n == 5)return "wu";
    else if(n == 6)return "liu";
    else if(n == 7)return "qi";
    else if(n == 8)return "ba";
    else if(n == 9)return "jiu";
}
int main()
{
    int n;
    cin >> n;
    if(n < 10)
    {
        cout << shift(n);
    }
    else if(n == 10)
    {
        cout << "shi";
    }
    else if(n < 20)
    {
        cout << "shi " << shift(n % 10);
    }
    else
    {
        if(n % 10 == 0)
        {
            cout << shift(n / 10) << " shi";
        }
        else
        {
            cout << shift(n / 10) << " shi " << shift(n % 10);
        }
    }
    return 0;
}