Question

Programming language is C++.

9. Write a program that reads digits and composes them into integers. For example, 123 is read as the characters 1, 2, and 3. The program should output 123 is 1 hundred and 2 tens and 3 ones. The number should be output as an int value Handle numbers with one, two, three, or four digits. Hint: To get the integer value 5 from the character '5' subtract '0' that is, '5'-'0'

Answer 1

Program:

#include<iostream>
#include<string>
#include<vector>
#include<sstream>
using namespace std;

int main()
{
   string digitsasSTR;
   cout<<"\nEnter digits (upto 4 digits): ";
   cin>>digitsasSTR;
   vector<int> numbers;
   int RequiredNumber;

   stringstream ss(digitsasSTR);

   int i;

   while (ss >> i)
{
numbers.push_back(i);

       //if not numbers remove it
if (ss.peek()-'0'<0 || ss.peek()-'0'>9)
ss.ignore();
}

   if(numbers.size()==1)
   {
       //compose the number
       RequiredNumber=numbers[0];
       cout<<"\n"<<RequiredNumber<<" is "<<numbers[0]<<" ones."<<"\n";
   }
   if(numbers.size()==2)
   {
       //compose the number
       RequiredNumber=(numbers[0]*10)+(numbers[1]*1);
       cout<<"\n"<<RequiredNumber<<" is "<<numbers[0]<<" tens and "<<numbers[1]<<" ones."<<"\n";
   }
   if(numbers.size()==3)
   {
       //compose the number
       RequiredNumber=(numbers[0]*100)+(numbers[1]*10)+(numbers[2]*1);
       cout<<"\n"<<RequiredNumber<<" is "<<numbers[0]<<" hundred and "<<numbers[1]<<" tens and "<<numbers[2]<<" ones."<<"\n";
   }
   if(numbers.size()==4)
   {
       //compose the number
       RequiredNumber=(numbers[0]*1000)+(numbers[1]*100)+(numbers[2]*10)+numbers[3];
       cout<<"\n"<<RequiredNumber<<" is "<<numbers[0]<<" thousands and "<<numbers[1]<<" hundreds and "<<numbers[2]<<" tens and "<<numbers[3]<<" ones." <<"\n";
   }
   cout<<"\n";
   system("pause");
   return 0;
}

Output:

H:Madhuri Cprograms\Debug Cprograms.exe Enter digits 〈upto 4 digits); 4.3.2.1 4321 is 4 thousands and 3 hundreds and 2 tens and 1 ones. Press any key to continue .. .