将字符转换为堆栈的字符串<string>

Question

我正在使用堆栈和队列来完成整个回文程序。我们的教授让我们从头开始编写堆栈和队列，并且只针对字符串。我正在从文件中读取文本并确定该句子是否是回文。我显然需要将每个字符推入堆栈和队列，但是，我怎样才能将一个字符推入接受字符串作为参数的堆栈！？

//get data from txt file
void getData(Stack &myStack, Queue &myQueue)
{
ifstream infile;

string temp;
int i = 0;

infile.open("palindrome.txt");

if (!infile)
{
    cout << "The file failed to open." << endl;
    exit(-1);
}

while (getline(infile, temp))
{

    //remove spaces form sentences
    temp.erase(remove_if(temp.begin(), temp.end(), ::isspace),temp.end());

 //need to push each character into stack and queue here
 //there are 5 sentences total in the file to check


    i++;


 }

Answer 1

std::string 有一个构造函数采用 (count, char)，如下所示：

char ch = 'A';
std::string str(1, ch);

见http://en.cppreference.com/w/cpp/string/basic_string/basic_string