B2004 求助

#include<iostream>
#include<cstring>
using namespace std;
int main()
{
	string s1,s2,s3;
	cin>>s1>>s2>>s3;
	long long a=s1.size(),b=s2.size(),c=s3.size();
		 if(a<=8)
		{
			if(s1[0]=='-') 
			{
				for(int i=1;i<=9-a;i++)
				cout<<" ";
			}
			else
			for(int i=1;i<=8-a;i++)
			cout<<" ";
		}	
		cout<<s1;
		 if(b<=8)
		{
			if(s2[0]=='-') 
			{
				for(int i=1;i<=9-b;i++)
				cout<<" ";
			}
			else
			for(int i=1;i<=8-b;i++)
			cout<<" ";
		}	
		cout<<" "<<s2;
		 if(c<=8)
		{
			if(s3[0]=='-') 
			{
				for(int i=1;i<=9-c;i++)
				cout<<" ";
			}
			else
			for(int i=1;i<=8-c;i++)
			cout<<" ";
		}	
		cout<<" "<<s3<<endl;
	return 0;
}