m final assignment

#include <iostream>
#include <cstdio>
#include <cstring>

using  namespace std;




int  cseId();
int  complexNumber();
int  stringMatch();
int  intFloat();
int password();



void menubar(){

    bool decision = true;

    while(decision){

        cout<<"1. cseId :\n";
        cout<<"2. complexNumber :\n";
        cout<<"3. stringMatch :\n";
        cout<<"4. intFloat :\n";
        cout<<"5. password :\n";

        string n;
        cin>>n;

        if(n == "1" ){

            int flag = cseId();

            if (flag ==1)

                cout<<"Accepted\n";
            else
                cout<<"Not Accepted\n";

        }

        else if(n == "2"){

            int flag =  complexNumber();

            if (flag ==1)

                cout<<"Accepted\n";
            else
                cout<<"Not Accepted\n";


        }
        else if(n == "3"){

            int flag =  stringMatch();

            if (flag ==1)

                cout<<"Accepted\n";
            else
                cout<<"Not Accepted\n";


        }
        else if(n == "4"){
            int flag = intFloat();

            if (flag ==1)

                cout<<"Accepted\n";
            else
                cout<<"Not Accepted\n";


        }
        else if(n == "5"){

            int flag = password();


            if (flag ==1)

                cout<<"Accepted\n";
            else
                cout<<"Not Accepted\n";

        }
        else{
            cout<<"Invalid input, enter again \n";
        }

    }

}



int main() {

    menubar();


    return 0;
}



int  cseId(){



    cout<<"Enter CSE id\n";

    string id;
    cin>>id;

    if(id[0] == '0' && id[1]=='1' && id[2] == '1'){

        if(id[5] == '1' || id[5] == '2' || id[5] == '3'){


            if(!(id[6] == '0' && id[7] == '0' && id[8] == '0')){

                return  1;
            }

        }
    }


        return 0;


}
int  complexNumber(){

    cout<<"Enter Complex Number\n";

    string id;
    cin>>id;

    if ((id[0] <= '9' && id[0] >='0')  || (id[0] <= 'z' && id[0] >= 'a')) {


        if (id[1] == '+'){

            if(id[2] ==  'i' || id[3] == 'i'){


                return  1;
            }

        }
    }

    return  0;

    }



int  stringMatch(){

    cout<<"Enter String\n";



    string id;
    cin>>id;

    if(id.size() <4)
        return 0;

    if(id[0] <=  '9' && id[0] >='0'){


        if (id[1] <= 'Z' && id[1] >= 'A'){

            if (!(id[2] <= 'Z' && id[2] >= 'A') || !(id[2] <= 'z' && id[2] >= 'a') ){

                if (((id[3] <= 'Z' && id[3] >= 'A')  || (id[3] <= 'z' && id[3] >= 'a')  || (id[3] <= '9' && id[3] >= '0'))){


                    return  1;
                }

            }
        }
    }


    return  0;



}
int  intFloat(){

    cout<<"Enter Float number\n";


    string id;
    cin>>id;

    int  len = id.length();
    for(int i=0; i<len; i++){


        if((id[i] <= 'z' && id[i] >= 'a')){

            return 0;
        }

    }

    if(id[len-1] == '.'){


        return 0;
    }

    return 1;





}
int password(){

    cout<<"Enter Password\n";




    string id;
    cin>>id;

    int  len = id.length();

    int  upper =0;
    int lower = 0;
    int number = 0;



    if(len < 8){

        return 0;
    }


    for(int i=0; i<len; i++){


        if((id[i] <= 'z' && id[i] >= 'a') ){

            lower++;
        }

        if((id[i] <= 'Z' && id[i] >= 'A') ){

            upper++;
        }

        if((id[i] <= '9' && id[i] >= '0') ){

            number++;
        }


    }

    if (lower == 0 || upper ==0 || number == 0){

        return 0;

    }

    if(!(id[len-1] !='@' || id[len-1] !='$' || id[len-1] !='#' || id[len-1] !='&')){


        return  0;

    }


    return  1;


}