tom4i

public class Test {
    public static void main(String[] args) {
        double d = 756.2345566;
 
        //方法一：最简便的方法，调用DecimalFormat类
        DecimalFormat df = new DecimalFormat(".00");
        System.out.println(df.format(d));
 
        //方法二：直接通过String类的format函数实现
        System.out.println(String.format("%.2f", d));

tom4i

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Looper;

import rx.Observable;
import rx.Scheduler;

tom4i

#include <iostream>
#include <string>
#include <QCoreApplication>
using namespace std;

/**
 * Type: Tower
 * -------------
 * This structure contains the name of the tower and a link to the next one.
 */

tom4i

/*
 * File: charstack.cpp
 * ---------------------
 * This file implements the CharStack class using a Vector<char> as the
 * underlying representation. The Vector class already implements most of
 * the essential operations for the CharStack class, which can simply
 * forward the request on to the underlying structure. The methods are
 * short enough to require no detailed documentation.
 */