C++ converting char variable to string variable is returning ASCII value

Question

My function looks like this:

string toOriginal(char c)
{
    if (c == '$')
        return "car";
    else if (c == '#')
        return "cdr";
    else if (c == '@')
        return "cons";
    else
    {
        string t = to_string(c);
        return t;
    }
}

However, when my character c contains a value like 'r', I would like for it to return "r" as a string. However, it returns a string "114".

R Sahu · Accepted Answer · 2017-10-23T20:55:09.117

7

std::to_string does not have an overload that takes a char. It converts the char to an int and gives you the string representation of the int.

Use std::string's constructor.

string t(1, c);

edited Oct 23 '17 at 20:55

answered Oct 23 '17 at 20:48

R Sahu

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Your arguments need to be switched: e.g. string t(1, c); Other than that, it worked. Thanks. – nhershy Oct 23 '17 at 20:53
@nhershy, aah. Yes. – R Sahu Oct 23 '17 at 20:55

score 2 · Answer 2 · answered Oct 23 '17 at 21:10

2

You can also use alternative string constructor like this:

  ...
    else
    {
        return std::string(&c, 1);
    }

answered Oct 23 '17 at 21:10

Killzone Kid

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score 1 · Answer 3 · answered Oct 23 '17 at 20:49

1

The method to_string() is for converting a numerical value to a string. A char is a numerical type.

See this related question on how to do it right: Preferred conversion from char (not char*) to std::string

answered Oct 23 '17 at 20:49

ypnos

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C++ converting char variable to string variable is returning ASCII value

3 Answers3