c++ string function

Code:

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string GetTok(string token,int nthToken,int ascSep) {
        int count = 1, start = 0, pos = 0;

        while (count <= nthToken) {
                pos = (token.find((char)ascSep,start) - start);
                if (count == nthToken) {
                        return token.substr(start,pos);
                        break;
                }
                start = (start + pos) + 1;
                count++;
        }
        return "";
}

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e.g..
GetTok(hi there guys, 1, 32) = hi
GetTok(hi there guys, 3, 32) = guys
etc, where the 3rd parameter is the ascii value to seperate the first string

any ideas if this can be coded better guys?