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Re: Using string as char array

Dec 2nd, 2008

•

Originally Posted by JackDurden

How would I delete one char from a string?
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C++ Syntax (Toggle Plain Text)
string aWord = "question?";
 
while(aWord[i])
	{
	if(isalpha(aWord[i]))printf ("character %c is alphabetic\n",aWord[i]);
	else
		delete[i]aWord;
    i++;
  }
string aWord = "question?"; while(aWord[i]) { if(isalpha(aWord[i]))printf ("character %c is alphabetic\n",aWord[i]); else delete[i]aWord; i++; }

I can give you two ways. one through STL & other through using the strings only

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 cpp Syntax (Toggle Plain Text) 
       string strWord = "Hello, World!";
	string strResult = "";
 
	for(size_t idx = 0; idx < strWord.size(); ++idx) {
		if (isalpha(strWord[idx])) {
			strResult += strWord[idx];
		}
	}
	cout<< strResult<<endl;
       string strWord = "Hello, World!";
	string strResult = "";

	for(size_t idx = 0; idx < strWord.size(); ++idx) {
		if (isalpha(strWord[idx])) {
			strResult += strWord[idx];
		}
	}
	cout<< strResult<<endl;

Another Way

 Help with Code Tags 
 cpp Syntax (Toggle Plain Text) 
  string strWord = "Hello, World! Laiq?";
	size_t pos = 0;
 
	for(size_t idx = 0; idx < strWord.size(); ++idx) {
		if (isalpha(strWord[idx])) {
			strWord[pos] = strWord[idx];
			++pos;
		}
	}
	strWord.resize(pos);
 
	cout<< strWord <<endl;
  string strWord = "Hello, World! Laiq?";
	size_t pos = 0;

	for(size_t idx = 0; idx < strWord.size(); ++idx) {
		if (isalpha(strWord[idx])) {
			strWord[pos] = strWord[idx];
			++pos;
		}
	}
	strWord.resize(pos);

	cout<< strWord <<endl;

Little more tricky.

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cpp Syntax (Toggle Plain Text)

   Check the remove_if (...)

Hope the above techniques might help you in understanding ?