Добавить проверку на ввод ошибочных данных

#include <iostream>
#include <string.h>
#include <iomanip>
using namespace std;
struct Trip                                      
{                                                 
 
int  number;                                  
char*   type;                            
char*    nz;                        
double  otTime;                             
double  prTime;                         
}; 
int main() {
char* type = new char[20];
 
struct Trip indexes[100];
char dPoint[20];
double time = 0.0;
int q,i;
 
 
 
cout << "Vvedite kolichestvo reisov: ";
cin >> q;
for ( i = 0; i < q; i++)
{
indexes[i].nz = new char[20];
indexes[i].type = new char[20];
}
for ( i = 0; i < q; i++) 
{
cout << "-------------------------------" << endl;
cout << "Nomer reisa: "; 
cin >> indexes[i].number;
cout << "Tip reisa: "; 
cin >> indexes[i].type;
cout << "Mesto nazhacheniya: ";
cin >> indexes[i].nz;
cout << "Vremya otpravleniya: "; 
cin >> indexes[i].otTime;
cout << "Vremya pribitiya: "; 
cin >> indexes[i].prTime;
cout << "-------------------------------" << endl;
 
}
 
cout <<"Vvedite mesto naznacheniya: "<<endl;
cin.get();
cin.getline(dPoint, 20);
cout<<"Vvedite vremya pribitiya(chas.minuta): ";
cin >> time;
cout<<endl<<"-----------------------------------------------" <<endl;
for( i=0; i < q; i++)
{
char *str = indexes[i].nz;
if(strcmp(dPoint, str) == 0)
if(indexes[i].prTime < time)
{
cout.width(21);
cout <<"Nomer reysa: "<<indexes[i].number<<endl;
cout.width(21);
cout<<"Tip reysa: "<<indexes[i].type<<endl;
cout.width(21);
cout<<"Mesto nazhacheniya: "<<indexes[i].nz<<endl;
cout.width(19);
cout<<"Vremia otpravleniya: "<<fixed<<setprecision(2)<<indexes[i].otTime<<endl;
cout.width(21);
cout<<"Vremya pribitiya: "<<fixed<<setprecision(2)<<indexes[i].prTime << endl;
cout <<"-----------------------------------------------" << endl;
}
getchar();
}
return 0;
}

do
{
   cout<<"Vvedite vremya pribitiya(chas.minuta): ";
   cin >> time;
   if(time<0 || time>24.00)
     cout<<"vveli nekorrektnie dannie\n";
}while(time<0 || time>24.00);