find a char in a string

This is a discussion on find a char in a string within the C++ Programming forums, part of the General Programming Boards category; Hello, I am trying to find and replace a character in a string. Code: #include <iostream> #include <string> using namespace ...

  1. #1
    Registered User
    Join Date
    Nov 2008
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    56

    find a char in a string

    Hello,

    I am trying to find and replace a character in a string.
    Code:
    #include <iostream>
    #include <string>
    using namespace std;
    
    int main()
    {
    	string s("This is a piece of text.  All of the \"a's\" will be replaced by \"XXX's\".");
    	const char target = 'a';
    	string replace_with("XXX");
    	
    	size_t pos = 0;
    	while(pos != string::npos)
    	{
    		pos = s.find(target, pos, 1);
    		if(pos != string::npos)
    		{
    			s.replace(pos, 1, replace_with);
    			pos++;
    		}
    	}
    	
    	cout << s << endl;
    	
    	return 0;
    }
    I am getting an error on the line that defines target.
    error: invalid conversion from ‘char’ to ‘const char*’
    If I put "a", in find(), in place of target it works.

  2. #2
    and the Hat of Guessing tabstop's Avatar
    Join Date
    Nov 2007
    Posts
    14,185
    The version of find that takes a single char as the first argument does not contain a third argument. (In fact, most of the versions of find don't take a third argument.)

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