Question

C++ language

I am having some trouble with user validation, can someone look at my code and tell me what I am doing wrong:

char firstInital, lastInitial;
   int userAge;
   std::cout << "Program 1-2: Get user initials and age in days\n ";
   std::cout << "-------------------------------------------------------------------------\n";

   std::cout << "Please enter the first letter of your first name: \n " << flush;
   std::cin >> firstInital;
   std::cout << "Please enter the first letter of your last name: \n ";
   std::cin >> lastInitial;

   std::cout <<"Hello "<< firstInital << lastInitial << " Please enter your age in years: \n ";
   std::cin >> userAge;
   std::cout << firstInital << lastInitial << " You are " << userAge << " years old, which means that you are at least "
       << userAge * 365 << " days old!\n ";
   while (true)
   {
       if (cin >> userAge)
       {
           break;
       }
       else
       {
           cin.clear();
           cin.ignore(INT_MAX, '\n');
           std::cout << " Invalid input, please enter only positive integers and try again: \n ";
       }
      
   }

Answer 1

Hey,

Below is the edited code to your question

#include<iostream>
#include <sstream>
using namespace std;
int check(string s)
{
for(int i=0;i<s.length();i++)
{
if(s[i]<48||s[i]>57)
return 0;
}
return 1;
}
int main()
{
char firstInital, lastInitial;
int userAge;
string age;
std::cout << "Program 1-2: Get user initials and age in days ";
std::cout << "------------------------------------------------------------------------- ";

std::cout << "Please enter the first letter of your first name: " << flush;
std::cin >> firstInital;
std::cout << "Please enter the first letter of your last name: ";
std::cin >> lastInitial;

std::cout <<"Hello "<< firstInital << lastInitial << " Please enter your age in years: ";
std::cin >> age;

while (check(age)==0)
{

std::cout << " Invalid input, please enter only positive integers and try again: ";
cin >> age;

}
stringstream g(age);
g>>userAge;

std::cout << firstInital << lastInitial << " You are " << userAge << " years old, which means that you are at least "
<< userAge * 365 << " days old! ";
}

Kindly revert for any queries

Thanks.