Character counting

This is a discussion on Character counting within the C++ Programming forums, part of the General Programming Boards category; Hey guys... Just wondering if you could give me a hand here... im trying to work out how to count ...

  1. #1
    Registered User
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    Unhappy Character counting

    Hey guys... Just wondering if you could give me a hand here... im trying to work out how to count how many characters there are in a string that is read from a text file... it basically reads in some peoples names, and obviously each name is going to be different lengths, and i need to work out how long each name is by counting the characters so i can get the formatting of the output right...

    any help would be much appreciated...

  2. #2
    Let's do some coding! Welshy's Avatar
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    I believe there is a function "size()" that could do what you want

  3. #3
    Registered User Micko's Avatar
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    Quote Originally Posted by Welshy
    I believe there is a function "size()" that could do what you want
    That's right. Or you can use length() as well. Here's simple code reading user input (it's pretty much same with files)
    Code:
    #include <iostream>
    #include <string>
    
    
    using namespace std;
    
    int main()
    {
    	string str;
    	getline(cin,str);
    	cout<<"There are "<<flush<<str.length()<<" characters!"<<endl;
    	system("pause");
    	return 0;
    }
    - Micko
    Gotta love the "please fix this for me, but I'm not going to tell you which functions we're allowed to use" posts.
    It's like teaching people to walk by first breaking their legs - muppet teachers! - Salem

  4. #4
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    there's quiete a few ways to do this. but really you should use methods 1 and 2 (below) most of the time, if not all of the time. i just wanted to show the last 2 so you can see how it works.

    Code:
    #include <string>
    #include <iostream>
    
    using namespace std;
    
    int main()
    {
    	char stringArray[] = "Blah blah blah";
    	string stringObject("hum dee dum");
    
    	//Method 1 and 2
    	cout << "stringArray size: " << strlen(stringArray) << endl;
    	cout << "stringObject length: " << stringObject.size() << endl;
    	//stringObject.size() and stringObject.length() ARE the same
    
    	//Method 3
    	char *p = stringArray;	
    	int i = 0;
    	while(*p++)
    		i++;
    	cout << "stringArray length: " << i << endl;
    
    	//Method 4
    	i = 0;
    	string::iterator si = stringObject.begin();
    	for(; si != stringObject.end(); si++, i++);
    		
    	
    	cout << "stringObject length: " << i << endl;
    }
    i seem to have GCC 3.3.4
    But how do i start it?
    I dont have a menu for it or anything.

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