Hackerrank-c-plus-plus-problem-solution/conditional statements.cpp at main · ashfaqjuniv2005/Hackerrank-c-plus-plus-problem-solution · GitHub

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#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);


int main()
{
    string n_temp;
    getline(cin, n_temp);

    int n = stoi(ltrim(rtrim(n_temp)));

    if(n==1){
        cout<<"one";
    }else if(n==2){
        cout<<"two";
    }else if(n==3){
        cout<<"three";
    }else if(n==4){
        cout<<"four";
    }else if(n==5){
        cout<<"five";
    }else if(n==6){
        cout<<"six";
    }else if(n==7){
        cout<<"seven";
    }else if(n==8){
        cout<<"eight";
    }else if(n==9){
        cout<<"nine";
    }else{
        cout<<"Greater than 9";
    }

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}