UVa 10424 - Love Calculator (just do as asked )

Link:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=16&page=show_problem&problem=1365
Sol:

#include<iostream>
	#include<string>
	using namespace std;
	int main(){
	freopen("in.txt","r",stdin);
	freopen("out.txt","w",stdout);
	string s1,s2;
	int sum1,sum2;
	while(getline(cin,s1)){
	getline(cin,s2);
	sum1=sum2=0;
	for(int i=0;i<s1.size();i++){
	if(islower(s1[i])) sum1+=s1[i]-'a'+1;
	else if(isupper(s1[i])) sum1+=s1[i]-'A'+1;
	}
	if(sum1%9==0) sum1=9;
	else sum1%=9;
	for(int i=0;i<s2.size();i++){
	if(islower(s2[i])) sum2+=s2[i]-'a'+1;
	else if(isupper(s2[i])) sum2+=s2[i]-'A'+1;
	}
	if(sum2%9==0) sum2=9;
	else sum2%=9;
	if(sum1>=sum2) printf("%.2f %c\n",sum2*100.0/sum1,'%');
	else printf("%.2f %c\n",sum1*100.0/sum2,'%');
	}
	return 0;
	}