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Help with input

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How can you count the number of characters entered into a variable... example int x; cin>>x; how can i count how many characters are in the variable i guess is what i''m asking.

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You can''t really count them if you are using an int value. An int value is a (normally) 32-bit value and is going to be the same size no matter what. All you can do is look at the value.

If you read your input into a string that would be a different story. You could do:

cin >> mystring;

int numchars = strlen( mystring );

lol but to be honest I never really learned about the stream operators in C++ so I don''t know that cin >> mystring is really a valid operation. Sorry if not. lol


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You could create a string of the integer, and then count the number of characters in the string:

#include <iostream>
#include <sstream>
#include <string>

using namespace std;

int main()
int x;
cout << "x: ";
if (cin >> x)
ostringstream s;
s << x;
string::size_type num_len = s.str().size();
cout << num_len;
cerr << "Please input a number!\n";
return 0;


Free multiplatform ANSI C++ Standard Library implementation
Visual C++ STL fixes
Visual C++ 6.0 noncompliance issues
C++ FAQ Lite

Edited by - JungleJim on June 9, 2001 9:39:40 AM

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