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  1. H

    Why the RationalNumber constructor is a conversion constructor in C++?

    hi: a RationalNumber class is declared as follows: class RationalNumber { public: RationalNumber(int num = 0, int denom = 1) : numerator(num), denominator(denom) {} private: int numerator, denominator; }; Explain why the RationalNumber...
  2. H

    I can't not enter timer0 interrupt code in IAR simulator

    hi: my simulator object is Atmega8 and my code below: #include<iom8.h> #define __enable_interrupt() SREG |= 0X80; #define __disable_interrupt() SREG &= 0X7F; #pragma vector= TIMER0_OVF_vect //timer overflow function, name doesn't matter. __interrupt void timer_overflow(void) { //LED...
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    why the interrupt address of the TIMER0 OVF is 0x12 in the IAR but not 0x009

    hi: I am going to use the interrupt of TIMER0 overflow with Atmega8 . I use the IAR to complie my code. but I find I have to define TIMER0 overflow's interrupt address at the 0x12 or use the macro TIMER0_OVF_vect which is defined in the headfile <iom8.h>. I search the IC's datasheet , I...
  4. H

    I need some tutorials of IAR for AVR

    hi: I am a beginner to IAR , I need some tutorials of IAR for AVR in order to do kindly the AVR job.
  5. H

    how to download my .hex file to the ATmega8 by ISP interface?

    how to download my .hex file to the ATmega8 by ISP interface using parallel port? hi: I need a sofeware to finish this job, who can introduce me what sofeware I need.
  6. H

    search a book named Computing Essentials 2008,Introductory Edition

    hi: I am searching for a book named "Computing Essentials 2008,Introductory Edition" to improve my computer english level. who can spport the ebook about this. thanks.
  7. H

    how do run int main(int argc,char * argv[]) in the visual C++

    hi: thanks arthur0's help. I have did as the same as you said, but the compiler still has errors : LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16 Debug/CommandLineArgs.exe : fatal error LNK1120: 1 unresolved externals Error executing link.exe...
  8. H

    looking for this book "The Thinking in C++ Annotated Solution Guide"

    hi: thanks your help. but I want to get the free-available electronic book. I can't purchase it .
  9. H

    looking for this book "The Thinking in C++ Annotated Solution Guide"

    Hi: I need this book named "The Thinking in C++ Annotated Solution Guide".who can offer the download website?
  10. H

    how do run int main(int argc,char * argv[]) in the visual C++

    the compiler still can not be compiled without errors. I am using VC++ 6.0, any settings need to be made? I have made the settings provided by "arthur0" ,but the compiler have another error: : fatal error C1071: unexpected end of file found in comment how can I do?
  11. H

    how do run int main(int argc,char * argv[]) in the visual C++

    hi: I want to run the below code in the the visual C++ #include<iostream> #include<cstdlib> #include<iomanip> using namespace std; int main(int argc,char * argv[]) { cout << "argc = " <<argc <<endl; for(int i =1; i<argc ;i++) cout << "argv[" << i <<"] = " << argv[i] <<...
  12. H

    how does this alarm speaker amplifier circuit to work?

    hi: here is a alarm speaker amplifier circuit , there is two MCU IO pins to driver the circuit to make the alarm speaker sound different alarm voice. But I have two question here : 1. the circuit is made of four transisters. how do the four transisters work? 2. how do I change...
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    how to simulate the burglar alarm voice with the MCU driving the buzzer

    hi: I want to simulate the six different voices with the MCU and the voices are sounded by a burglar alarm . But I don't know the voices' tone and meter. so I can't not program code to drive the buzzer sounding the similar voice. how can I get the tone and meter from the voice source...
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    How to realize visual serial port with VC++ to receive the data from serial port

    hi : I want to explore a application to monitor the real-time data receiving from the serial port wiht VC++ 6.0, then the application will draw a curve according to the data like temperature monitor.But I don't know how can I do that.
  15. H

    Dev C++ Serial Port Interfacing

    thanks Good Luck.

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