c++ - How do I make boundaries when inputting time? -


i'm typing program right , requires me input departure , arrival time. how can make input value has within 0:00 , 23:59?

right have 

cout << "\n\nenter departure time on first day of trip : "; cin >> departure_time;  cout << "\n\nenter arrival time on last day of trip : "; cin >> arrival_time;

and want make can't time outside of boundaries.

try using while loop test if departure_time , arrival_time within bounds. based on result either move on rest of program or redirect user start.

this can implemented multitude of ways. without knowing how plan use data , solely based on code provided example should illustrate idea of while loops ability check invalid input.

int main() {     beginning:     double departure_time = 0.00, arrival_time = 0.00;     cout<<"\n\nenter departure time on first day of trip : ";     cin>> departure_time;     cout<<"\n\nenter arrival time on last day of trip : ";     cin>> arrival_time;     while (departure_time < 0.00 || arrival_time > 23.59) {         cout<<"\n\ntry again...";         cin.clear();         cin.sync();         goto beginning;     }     return 0; }

this quick implementation illustrate point. hope helps.


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