Write a program to read an integer number and find its number of digits ( for ex

Question

Write a program to read an integer number and find its number of digits ( for example, 3459 has 4 digits and 125860 has 6 digits).

The program should be designed in a way that the user could test as many numbers as desired without leaving the program. Use only long integer ( int or long int ) data type in this program; however make sure that the program rejects any input outside the long integer data range ( about -2000000000 to +2000000000).

The output of the program should be written to an output file having a format exactly like the following table.

VALUE ENTERED NUMBER OF DIGITS
1241 4
19 2
5684900 7
0 1
-153 3
4000000000 Invalid

Test the program for at least seven integer values between 2,000,000,000 and a number outside the long int data range.
Maximum value for long int is 2147483647.

Explanation / Answer

please rate - thanks

#include <iostream>
#include <fstream>
using namespace std;
int main()
{long num;
int count;
ofstream out;
out.open("output.txt");
out<<"VALUE ENTERED   NUMBER OF DIGITS ";
cout<<"Enter a number (CTRL^Z to exit): ";
cin>>num;
while(cin)
   {count=0;

   out<<num<<" ";
      { if(num<0)
           num*=-1;
      if(num==0)
          count=1;
       while(num>0)
          {count++;
            num/=10;
            }
        out<<count<<endl;
        }       
     cout<<"Enter a number (CTRL^Z to exit): ";
          cin>>num;
     while(cin.fail())
          {if(cin.eof())
                {out.close();
                return 0;
                }
           out<<num<<" ";
             cin.clear();
          out<<"invalid ";
          cout<<"Enter a number (CTRL^Z to exit): ";
          cin>>num;
          }
               }

system("pause");
return 0;
}

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.