Checking for non terminating block statements in a file

I am working on a project that wants me to check for multi comments in a text file and also to see if it is a non terminating block statements. Pretty much I am using get char to check each character and compare it to the multi comment symbols and use peek to see if the next character matches the other symbols. The first part is working but to know when there is no terminating block statements is confusing please help.

if (c == '#' && inFile.peek() == '|') {
    char next = '\0';
        multipleComment += c;

        while (inFile.get(c)) {
            next = inFile.peek();
            multipleComment += c;

            if (c == '\n')
                lineNumber++;

            if (c == '|' && next == '#')
            {
                multipleComment += next;
                tokenTypes.push_back(multipleComment);
                values.push_back("COMMENT");
                lineNumbers.push_back(lineNumber);
                multipleComment.clear();
                break;
            }
            else {
                values.push_back("UNDEFINED");
                tokenTypes.push_back(text);
                lineNumbers.push_back(lineNumber);

            }
        }
}