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[C++]Strings and characters
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Flyte
Peanuts!!!!

Reputation: 6

Joined: 19 Apr 2006
Posts: 1887
Location: Canada

Posted: Tue Nov 24, 2009 6:00 pm Post subject:

Fendaril wrote:

For a project such as this you REALLY do not need a class.

Do you make it a habit to continually challenge your intellectual superiors?

There is no reason to not use a class. The whole point of the project is to learn. He wouldn't learn anything if he treated C++ as a lenient version of C like the rest of this forum does.

IMRobbie
Newbie cheater

Reputation: 0

Joined: 26 Sep 2009
Posts: 24

Posted: Tue Nov 24, 2009 6:03 pm Post subject:

Flyte wrote:

This is what I mean by "thinking in classes".

Code:

#include <iostream>
#include <string>
#include <set>
#include <algorithm>
#include <functional>

using namespace std;

class MaskedString {
const string m_string;
set<char> m_letters;

bool IsMasked(const char C) const {
   return (m_letters.find(C) == m_letters.end());
}

public:

MaskedString(const string & Target)
   : m_string(Target) {}

string Masked() const {
   string ret(m_string);
   replace_if(ret.begin(), ret.end(), bind1st(mem_fun(&MaskedString::IsMasked), this), '-');
   return ret;
}

string Real() const {
   return m_string;
}

void Unmask(const char C) {
   m_letters.insert(C);
}
};

int main()
{
string random = "zorro";
MaskedString zorro(random);

zorro.Unmask('z');
zorro.Unmask('r');

cout << zorro.Masked() << endl;
cout << zorro.Real() << endl;

return 0;
}

I'm fairly new at the C++ language, I haven't really got into classes. =(

Fendaril wrote:

Loop through the string. If the inputted letter equals to a letter in the string display it. It is not hard.

Like I said you can index Strings like arrays.

Could something like this be used to find the occurrences?

Code:

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

int main() {
string guessWord = "Hello";
string letter = "";
int letterPos = 0;

cout << "Enter a letter: ";
cin >> letter;

int numChars = guessWord.length();

for(int x = 0; x < numChars; x++)
{
   if(guessWord.find(letter, 0) != -1) {
      letterPos = guessWord.find(letter);
      cout << "Yes, letter " << letter << " was found!";
      cout << "\nThe letter you enter was found in the string at index position ";
      cout << letterPos << endl;

      x = numChars;
   } else {
      cout << "Nope\n";
      x = numChars;
   }
}
return 0;
}

Last edited by IMRobbie on Fri Jan 29, 2010 2:27 pm; edited 7 times in total

Fendaril
Cheater

Reputation: 0

Joined: 08 Nov 2009
Posts: 27

Posted: Tue Nov 24, 2009 6:11 pm Post subject:

yes.

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