Conversion from string to char - c++

Question

For a program I'm writing based on specifications, a variable is passed in to a function as a string. I need to set that string to a char variable in order to set another variable. How would I go about doing this?

This is it in the header file:

void setDisplayChar(char displayCharToSet);

this is the function that sets it:

void Entity::setElementData(string elementName, string value){
    if(elementName == "name"){
            setName(value);
    }
    else if(elementName == "displayChar"){
    //      char c;
      //      c = value.c_str();
            setDisplayChar('x');//cant get it to convert :(
    }
    else if(elementName == "property"){
            this->properties.push_back(value);
    }
}

Thanks for the help in advanced!

You mean you just want to pass in the first character? `value[0]`. — chris, Feb 12 '13 at 04:46
Verifying that value is one character in length, ideally. Also: pass by const& ;) — Peter Huene, Feb 12 '13 at 04:47

score 12 · Accepted Answer · answered Feb 12 '13 at 04:47

You can get a specific character from a string simply by indexing it. For example, the fifth character of str is str[4] (off by one since the first character is str[0]).

Keep in mind you'll run into problems if the string is shorter than your index thinks it is.

c_str(), as you have in your comments, gives you a char* representation (the whole string as a C "string", more correctly a pointer to the first character) rather than a char.

You could equally index that but there's no point in this particular case.

Yessssss!!! Thank you! Haha Idk why I didn't try that to begin with. It seemed too simple. — ModdedLife, Feb 12 '13 at 04:50

score 5 · Answer 2 · answered Feb 12 '13 at 04:47

5

you just need to use value[0] and that returns the first char.

char c = value[0];

answered Feb 12 '13 at 04:47

Luis Tellez

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Conversion from string to char - c++

2 Answers2