用sstream来翻转浮点数

#include <iostream>
#include <sstream>
using namespace std;

double reverse_double(double arg);

int main(void)
{
    double num = 2345.78;
    cout << num << " " << reverse_double(num) << endl;

    return 0;
}

double reverse_double(double arg)
{
    ostringstream oss;
    oss << arg;
    string str = oss.str();
    for (int i = 0; i < str.size()/2; ++i)
    {
        char temp;
        temp = str[i];
        str[i] = str[str.size()-i-1];
        str[str.size()-i-1] = temp;
    }
    istringstream iss(str);
    iss >> arg;
    return arg;
}