Mine

#include <iostream>

using namespace std;

int main() {
    const int lowestDayInMonth   = 1;
    const int highestDayInMonth  = 31;
    const int lowestTemperature  = -70;
    const int highestTemperature = 70;
    const int lowestMmRain       = 0;
    const int highestMmRain      = 200;

    cout << "Velkommen til vaerprogrammet mitt!";

    int run = 1;
    while(run == 1) {
		int daysInMonth = 0;

		float minTemp = 0, maxTemp = 0, mmRain = 0;
		float sumMinTemp = 0, sumMaxTemp = 0, sumMmRain = 0;

		char appStatus;

		cout << "\n\nVennligst tast inn antall dager i maaneden: (" << lowestDayInMonth << " -> " << highestDayInMonth << ")\n";
		do {
			cin >> daysInMonth;
			cin.ignore();

			if(daysInMonth < lowestDayInMonth || daysInMonth > highestDayInMonth) cout << "Du maa skrive inn et tall mellom " << lowestDayInMonth << " og " << highestDayInMonth << "\n";
		}

		while(daysInMonth < lowestDayInMonth || daysInMonth > highestDayInMonth);
		for(int i = 1; i <= daysInMonth; i++) {
			cout << "\nDag nummer: " << i << "\n";

			cout << "\tMin. temp: (" << lowestTemperature << " -> " << highestTemperature << ")\n";
            do {
            	cin >> minTemp;
                cin.ignore();

                if(minTemp < lowestTemperature || minTemp > highestTemperature) cout << "Du maa skrive inn et tall mellom " << lowestTemperature << " og " << highestTemperature << "\n";
            }

            while(minTemp < lowestTemperature || daysInMonth > highestTemperature);
            sumMinTemp += minTemp;

            cout << "\tMax. temp: (" << minTemp << " -> " << highestTemperature << ")\n";
            do {
            	cin >> maxTemp;
                cin.ignore();

                if(maxTemp < minTemp || minTemp > highestTemperature) cout << "Du maa skrive inn et tall mellom " << minTemp << " og " << highestTemperature << "\n";
            }

            while(maxTemp < minTemp || maxTemp > highestTemperature);
            sumMaxTemp += maxTemp;

            cout << "\tMm. rain: (" << lowestMmRain << " -> " << highestMmRain << ")\n";
            do {
            	cin >> mmRain;
                cin.ignore();

                if(mmRain < lowestMmRain || minTemp > highestMmRain) cout << "Du maa skrive inn et tall mellom " << lowestMmRain << " og " << highestMmRain << "\n";
            }

            while(mmRain < lowestMmRain || mmRain > highestMmRain);
            sumMmRain += mmRain;
		}

        cout << "\n";
        cout << "Gjennomsnittlig min. temp: " << sumMinTemp/daysInMonth << "\n";
        cout << "Gjennomsnittlig max. temp: " << sumMaxTemp/daysInMonth << "\n";
        cout << "Gjennomsnittlig nedbor: " << sumMmRain/daysInMonth << "mm\n";
        cout << "Total nedbor: " << sumMmRain << "mm\n";

		cout << "\nVil du legge inn enda en maaned? (j/n)\n";
		cin >> appStatus;

		if(appStatus == 'n') {
			cout << "Takk for at du brukte meg!";
			run = 0;
		}

        cin.get();
    }
}