poj 3095 Linear Pachinko

#include<iostream>            //水题
#include<string>
using namespace std;
int main()
{
    string str;
    int i,j;
    while(cin>>str&&str!="#")
    {
        int s=0;
        for(i=0;i<str.size();++i)
        {
            if(str[i]=='.')
                s+=100;
            else if(str[i]=='|')
            {
                for(j=i-1;j>=0&&str[j]=='_';--j);
                if( j==-1 ||str[j]=='.' )
                    s+=50;
                for(j=i+1;j<str.size()&&str[j]=='_';++j);
                if( j==str.size()||str[j]=='.')
                    s+=50;                            
            }
            else if(str[i]=='/')
            {
                for(j=i-1;j>=0&&str[j]=='_';--j);
                if( j==-1 ||str[j]=='.')
                    s+=100;                
            }            
            else if(int(str[i])==92)    //else if(str[i]=='\\')
            {
                for(j=i+1;j<str.size()&&str[j]=='_';++j);
                if( j==str.size()||str[j]=='.')
                    s+=100;    
            }
        }
        cout<<int(s/(str.size()+0.0))<<endl;
    }
    return 0;
}