login notification c++ implementation

//             _   _
//   __ _ _   _| |_| |__   ___  _ __
//  / _` | | | | __| '_ \ / _ \| '__|
// | (_| | |_| | |_| | | | (_) | |
//  \__,_|\__,_|\__|_| |_|\___/|_|
//              _ _            _             _
//   __ _ _ __ (_) | __   __ _| | ____ _ ___| |__
//  / _` | '_ \| | |/ /  / _` | |/ / _` / __| '_ \
// | (_| | | | | |   <  | (_| |   < (_| \__ \ | | |
//  \__,_|_| |_|_|_|\_\  \__,_|_|\_\__,_|___/_| |_|

#include<bits/stdc++.h>
using namespace    std;

#define flush        cin.ignore(numeric_limits<streamsize>::max(),'\n')
#define fasterio     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define NL           cout<<endl;
#define pi           acos(-1.0) //3.1415926535897932384626
#define dpoint(x)    fixed<<setprecision(x)
#define debug(x)     cout<<x<<endl;
#define gcd(a,b)     __gcd(a,b);
#define lcm(x,y)     (a * (b / gcd(a, b)));
#define pb           push_back
#define mx          100000005

typedef long long int       ll;
typedef double              dl;
typedef unsigned long long  ul;

// --------------------------Pre made Functions & Proto Type--------------------------//
template <class T> T digitsum(T n){T sum=0;while(n!=0){sum+=n%10;n/=10;}return sum;}

string pass, in, test;

bool num_checker()
{
    int pass_digit=0, in_digit=0;
    for(int i=0; i<pass.size(); i++)
    {
        if(isdigit(pass[i]))pass_digit++;
    }
    for(int i=0; i<in.size(); i++)
    {
        if(isdigit(in[i]))in_digit++;
    }
    if(pass_digit>0 && in_digit==0)
    return true;
    else return false;
}
bool caps_checker()
{
     for(int i=0; i<pass.size(); i++)
    {
        if( !isdigit(pass[i]) )test+=pass[i];
    }

         for(int i=0; i<test.size(); i++)
        {
            if( (test[i]>='A' && test[i]<='Z') && (in[i]>='a' && in[i]<='b'))
            {
                char c = toupper(in[i]);
                if(test[i]  == c )continue;
                else return false;
            }
            else if( (test[i]>='a' && test[i]<='z') && (in[i]>='A' && in[i]<='Z'))
            {
                char c = tolower(in[i]);
                if(test[i]  == c )continue;
                else return false;
            }
            else if(test[i]==in[i])continue;
            else return false;
        }

    return true;
}

int main()
{
    #ifdef EXTRA_8
        clock_t tStart = clock();
        freopen("input.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
        int t;
        cin>>t;
        for(int k=1; k<=t; k++)
        {
            cin>>pass>>in;
            cout<<"Case "<<k<<": ";
            if(pass.size() == in.size())
            {
                bool flg = true;
                for(int i=0; i<pass.size(); i++)
                {
                    if(pass[i]==in[i])continue;
                    else {flg = false; break;}
                }
                if(flg)cout<<"Login successful."<<endl;
                else {
                   int x = num_checker(); int y = caps_checker();
                   if(x == 1 && y == 1)cout<<"Wrong password. Please, check your caps lock and num lock keys."<<endl;
                   else if(x==1)cout<<"Wrong password. Please, check your num lock keys."<<endl;
                   else if(y==1)cout<<"Wrong password. Please, check your caps lock keys."<<endl;
                   else cout<<"Wrong password."<<endl;
                }
            }
            else cout<<"Wrong password."<<endl;
        }

    #ifdef EXTRA_8
        fprintf(stderr, "\n>> Runtime: %.10fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
    #endif
    return 0;
}




//  _____            _   _            _                      ___   __
// |  ___|__  _ __  | |_| |__   ___  | |    _____   _____   / _ \ / _|
// | |_ / _ \| '__| | __| '_ \ / _ \ | |   / _ \ \ / / _ \ | | | | |_
// |  _| (_) | |    | |_| | | |  __/ | |__| (_) \ V /  __/ | |_| |  _|
// |_|  \___/|_|     \__|_| |_|\___| |_____\___/ \_/ \___|  \___/|_|
//   ____ ____
//  / ___|  _ \
// | |   | |_) |
// | |___|  __/
//  \____|_|
//