1060. Are They Equal (25)PAT甲级

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#include<iostream>#include<string>using namespace std;string treat(string s,int &e,int n){    int pos=0;    while(s.length()>0&&s[0]=='0'){        s.erase(s.begin());    }    if(s[0]=='.'){        s.erase(s.begin());        while(s.length()>0&&s[0]=='0'){            s.erase(s.begin());            e--;        }    }    else{        while(pos<s.length()&&s[pos]!='.'){            pos++;            e++;        }         if(pos<s.length()){            s.erase(s.begin()+pos);        }    }    if(s.length()==0){        e=0;    }    int num=0;    pos=0;    string result;    while(num<n){        if(pos<s.length())  result+=s[pos++];        else    result+='0';        num++;    }    return result;}int main(){    int n;    string s1,s2,s3,s4;    cin>>n>>s1>>s2;    int e1=0,e2=0;    s3=treat(s1,e1,n);    s4=treat(s2,e2,n);    if(s3==s4&&e1==e2){        cout<<"YES"<<" 0."<<s3<<"*10^"<<e1<<endl;    }    else{        cout<<"NO"<<" 0."<<s3<<"*10^"<<e1<<" 0."<<s4<<"*10^"<<e2<<endl;    }}

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