library.cpp

本文展示了一个使用C++编写的简单图书信息管理程序。该程序定义了一个名为Book的类,用于存储图书的标题、作者、出版社及价格等信息,并通过成员函数实现图书信息的显示。主函数中创建了四个Book对象并分别赋值,最后调用成员函数显示所有图书的详细信息。

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  name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <iostream.h>
#include <iomanip.h>
#include <string.h>

class Book
{
  public:
    void show_title(void) { cout << title << '/n'; };
    void show_book(void) { show_title(); show_publisher(); };
    void assign_members(char *, char *, char *, float);
  private:
    char title[256];
    char author[64];
    float price;
    char publisher[256];
    void show_publisher(void) { cout << publisher << '/n'; };
};


void Book::assign_members(char *title, char *author, char *publisher,
    float price)
 {
   strcpy(Book::title, title);
   strcpy(Book::author, author);
   strcpy(Book::publisher, publisher);
   Book::price = price;
 }


void main(void)
 {
   Book Library[4];

   Library[0].assign_members("Jamsa's C/C++ Programmer's Bible", "Jamsa and Klander",
    "Jamsa Press", 49.95);
   Library[1].assign_members("Hacker Proof", "Klander", "Jamsa Press", 54.95);
   Library[2].assign_members("ActiveX Programmer's Library", "Lalani and Chandak",
        "Jamsa Press", 49.95);
   Library[3].assign_members("Rescued by C++, Third Edition", "Jamsa",
        "Jamsa Press", 24.95);
 
   for (int i = 0; i < 4; i++)
     Library[i].show_book();
 }

 

我在ardupilot/library中新添加了两个文件,编译到最后出现报错usr/bin/ld: lib/libArduPlane_libs.a(AP_CANManager.cpp.0.o): in function `AP_CANManager::init()': AP_CANManager.cpp:(.text._ZN13AP_CANManager4initEv+0x556): undefined reference to `AP_ToshibaCAN::AP_ToshibaCAN()' collect2: error: ld returned 1 exit status Waf: Leaving directory `/home/hjhj3/ardupilot/build/sitl' Build failed -> task in 'bin/arduplane' failed (exit status 1): {task 127115774264480: cxxprogram AP_Arming.cpp.53.o,AP_ExternalControl_Plane.cpp.53.o,Attitude.cpp.53.o,GCS_MAVLink_Plane.cpp.53.o,GCS_Plane.cpp.53.o,Log.cpp.53.o,Parameters.cpp.53.o,Plane.cpp.53.o,RC_Channel_Plane.cpp.53.o,VTOL_Assist.cpp.53.o,afs_plane.cpp.53.o,altitude.cpp.53.o,avoidance_adsb.cpp.53.o,commands.cpp.53.o,commands_logic.cpp.53.o,control_modes.cpp.53.o,ekf_check.cpp.53.o,events.cpp.53.o,failsafe.cpp.53.o,fence.cpp.53.o,is_flying.cpp.53.o,mode.cpp.53.o,mode_LoiterAltQLand.cpp.53.o,mode_acro.cpp.53.o,mode_auto.cpp.53.o,mode_autoland.cpp.53.o,mode_autotune.cpp.53.o,mode_avoidADSB.cpp.53.o,mode_circle.cpp.53.o,mode_cruise.cpp.53.o,mode_fbwa.cpp.53.o,mode_fbwb.cpp.53.o,mode_guided.cpp.53.o,mode_loiter.cpp.53.o,mode_manual.cpp.53.o,mode_qacro.cpp.53.o,mode_qautotune.cpp.53.o,mode_qhover.cpp.53.o,mode_qland.cpp.53.o,mode_qloiter.cpp.53.o,mode_qrtl.cpp.53.o,mode_qstabilize.cpp.53.o,mode_rtl.cpp.53.o,mode_stabilize.cpp.53.o,mode_takeoff.cpp.53.o,mode_thermal.cpp.53.o,mode_training.cpp.53.o,motor_test.cpp.53.o,navigation.cpp.53.o,parachute.cpp.53.o,pullup.cpp.53.o,qautotune.cpp.53.o,quadplane.cpp.53.o,radio.cpp.53.o,reverse_thrust.cpp.53.o,sensors.cpp.53.o,servos.cpp.53.o,soaring.cpp.53.o,system.cpp.53.o,tailsitter.cpp.53.o,takeoff.cpp.53.o,tiltrotor.cpp.53.o,tuning.cpp.53.o -> arduplane} (run with -v to display more information)
03-15
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