Question

Как сделать, чтобы при вводе данных "31 февраля" выдало "Неизвестная операция"? С++ // 2.cpp: определяет точку входа для консольного приложения. #include "stdafx.h" #include using namespace std; int main() { int month, day; cout << "Programma opredeleniya znaka zodiaka" << endl; cout << "Vvedite mecyac:"; cin >> month; cout << "Vvedite den: "; cin >> day; switch (month) { case 1: if (day <21) cout << "Kozerog" << endl; else cout << "Vodoley" << endl; break; case 2: if (day <19) cout << "Vodoley" << endl; else cout << "Ryby" << endl; break; case 3: if (day <21) cout << "Ryby" << endl; else cout << "Oven" << endl; break; case 4: if (day <20) cout << "Oven" << endl; else cout << "Telec" << endl; break; case 5: if (day <21) cout << "Telec" << endl; else cout << "Bliznecy" << endl; break; case 6: if (day <22) cout << "Bliznecy" << endl; else cout << "Rak" << endl; break; case 7: if (day <23) cout << "Rak" << endl; else cout << "Lev" << endl; break; case 8: if (day <23) cout << "Lev" << endl; else cout << "Deva" << endl; break; case 9: if (day <23) cout << "Deva" << endl; else cout << "Vesy" << endl; break; case 10: if (day <23) cout << "Vesy" << endl; else cout << "Skorpion" << endl; break; case 11: if (day <23) cout << "Skorpion" << endl; else cout << "Strelec" << endl; break; case 12: if (day <22) cout << "Strelec" << endl; else cout << "Kozerog" << endl; default: cout << "Neizvestnaya operaciya"< } system("pause"); return 0; }

Answer 1

#include <iostream>
using namespace std;

int main() {
   int month, day;
   string a[13] = {"Kozerog","Vodoley","Ryby","Oven","Telec","Bliznecy",
       "Rak","Lev","Deva","Vesy","Skorpion","Strelec","Kozerog"};
   int mes[12] = {31,29,31,30,31,30,31,30,31,31,30,31};
   int bound[12] = {21,19,21,20,21,22,23,23,23,23,23,22};
   cout << "Programma opredeleniya znaka zodiaka" << endl;
   cout << "Vvedite mecyac: ";
   cin >> month;
   cout << "Vvedite den: ";
   cin >> day;
   if ((month<1 || month>12) || (day<1 || day>mes[month-1])) 
      cout<<"invalid input"<<endl;
   else {
         if (day<bound[month-1]) cout<<a[month-1]<<endl;
         else cout<<a[month]<<endl;
   }         
   system("pause");
   return 0;
}

Answer 2

Могу предложить в case'е написать через "if else".

И в конце вместо
"default: cout << "Neizvestnaya operaciya"< }"
Должно быть
"default: cout << "Neizvestnaya operaciya"<< endl; }"
case 2:if (day <19) cout << "Vodoley" << endl;else if (day >= 19 && day <= 29)cout << "Ryby" << endl;else {     cout << "Neizvestnaya operaciya" << endl;     } break;


На скрине показано куда вставлять код.