c++ Alarm Clock program (Reddit DailyProgrammer #321)

alarmClock.cpp

#include <string>
#include <iostream>
using namespace std;

int tim,raw,one,ten,hou=0;
string amp;

string parsec() {
    string voice;
    switch (one) {
        case 1: voice="eleven"; break;
        case 2: voice="twelve"; break;
        case 3: voice="thirteen"; break;
        case 4: voice="fourteen"; break;
        case 5: voice="fifteen"; break;
        case 6: voice="sixteen"; break;
        case 7: voice="seventeen"; break;
        case 8: voice="eighteen"; break;
        case 9: voice="nineteen"; break;
    }
    return voice;
}

string parseb(int x) {
    string voice;
    switch (x) {
        case 0: voice="oh-"; break;
        case 1: voice=parsec(); break;
        case 2: voice="twenty-"; break;
        case 3: voice="thirty-"; break;
        case 4: voice="forty-"; break;
        case 5: voice="fifty-"; break;
    }
    return voice;
}

string parsea(int x) {
    string voice;
    switch (x) {
        case 0: voice="twelve "; break;
        case 1: voice="one "; break;
        case 2: voice="two "; break;
        case 3: voice="three "; break;
        case 4: voice="four "; break;
        case 5: voice="five "; break;
        case 6: voice="six "; break;
        case 7: voice="seven "; break;
        case 8: voice="eight "; break;
        case 9: voice="nine "; break;
        case 10: voice="ten "; break;
        case 11: voice="eleven "; break;
        case 12: voice="twelve "; break;
    }
    return voice;
}

int scrub(char par[6],int raw) {
    if (raw<1000 && raw>99) {
        one=par[3]-48;
        ten=par[2]-48;
        hou=par[1]-48;
        amp="A.M.";
    }
    else {
        int big=0;
        hou=raw;
        one=par[3]-48;
        ten=par[2]-48;
        big=ten*10;
        hou=(hou-one-big)/100;
        if (hou<12) amp="A.M.";
        else {
            amp="P.M.";
            hou=hou-12;
        }
    }
    return 0;
}

int gather() {                          //Takes input, parses out anything non-numeric
    string temp;
    int y=0;
    int z=0;
    char a[6],b[6];
    for (int z=0;z<=6;z++) {            //Nullifies holding arrays
        a[z]='\n';
        b[z]='\n';
    }
    getline (cin,temp);
    strcpy(a,temp.c_str());             //Fills array a with input
    for (int x=0; x<6; x++) {
        if ((a[x]>47 && a[x]<58)) {
            b[y]=a[x];
            y++;
        }
    }
    z=atoi(b);
    cout<<b[0]<<endl<<b[1]<<endl<<b[2]<<endl<<b[3]<<endl;
    cout<<z<<endl;
    scrub(b,z);
    return z;
}

int main() {
    cout<<"What time is it?"<<endl;
    tim=gather();
    if (tim>2359||tim<0||one>9||ten>6) { cout<<"Invalid entry. Please try again."<<endl; return 0; }
    else {
    cout<<"It's "<<parsea(hou)<<parseb(ten);
    if (ten!=1) cout<<parsea(one);
        cout<<" "<<amp<<endl;
        return 1;
    };
}