Roman numerals BIT1002

大水题。。

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<string>
using namespace std;
int change(string temp)//将输入的temp转化为数字1，2，，，10
{
	if(temp.size()==0)
	{
		return 0;
	}
	if(temp.compare("I")==0)
	{
		return 1;
	}
	if(temp.compare("II")==0)
	{
		return 2;
	}
	if(temp.compare("III")==0)
	{
		return 3;
	}
	if(temp.compare("IV")==0)
	{
		return 4;
	}
	if(temp.compare("V")==0)
	{
		return 5;
	}
	if(temp.compare("VI")==0)
	{
		return 6;
	}
	if(temp.compare("VII")==0)
	{
		return 7;
	}
	if(temp.compare("VIII")==0)
	{
		return 8;
	}
	if(temp.compare("IX")==0)
	{
		return 9;
	}
	if(temp.compare("X")==0)
	{
		return 10;
	}
}
int main()
{
	int total;
	cin>>total;
	while(total--)
	{
		string Roman;
		cin>>Roman;
		int ans;
		if(Roman.size()>=1&&Roman[0]=='L')
		{
			cout<<"50"<<endl;
			continue;
		}
		if(Roman.size()>=2&&Roman[0]=='X'&&Roman[1]=='L')
		{
			ans=40;
			string t(Roman,2,Roman.size()-2);
			ans+=change(t);
			cout<<ans<<endl;
			continue;
		}
		if(Roman.size()>=3&&Roman[0]=='X'&&Roman[1]=='X'&&Roman[2]=='X')
		{
			ans=30;
			string t(Roman,3,Roman.size()-3);
			ans+=change(t);
			cout<<ans<<endl;
			continue;
		}
		if(Roman.size()>=2&&Roman[0]=='X'&&Roman[1]=='X')
		{
			ans=20;
			string t(Roman,2,Roman.size()-2);
			ans+=change(t);
			cout<<ans<<endl;
			continue;
		}
		if(Roman.size()>=1&&Roman[0]=='X')
		{
			ans=10;
			string t(Roman,1,Roman.size()-1);
			ans+=change(t);
			cout<<ans<<endl;
			continue;
		}
		cout<<change(Roman)<<endl;
	}
	return 0;
}