Implementation of a timer

 

Directly Add code

Define the header file:

 

//: C09: Cpptime. h

// From Thinking in C ++, 2nd Edition

// Available at http://www.BruceEckel.com

// (C) Bruce Eckel 2000

// Copyright notice in Copyright.txt

// A simple time class

# Ifndef CPPTIME_H

# Define CPPTIME_H

# Include <ctime>

# Include <cstring>

 

Class Time {

Time_t t;

Tm local;

Char asciiRep [26];

Unsigned char lflag, aflag;

Void updateLocal (){

If (! Lflag ){

Local = * localtime (& t );

Lflag ++;

}

}

Void updateAscii (){

If (! Aflag ){

UpdateLocal ();

Strcpy (asciiRep, asctime (& local ));

Aflag ++;

}

}

Public:

Time () {mark ();}

Void mark (){

Lflag = aflag = 0;

Time (& t );

}

Const char * ascii (){

UpdateAscii ();

Return asciiRep;

}

// Difference in seconds:

Int delta (Time * dt) const {

Return int (difftime (t, dt-> t ));

}

Int daylightSavings (){

UpdateLocal ();

Return local. tm_isdst;

}

Int dayOfYear () {// Since January 1

UpdateLocal ();

Return local. tm_yday;

}

Int dayOfWeek () {// Since Sunday

UpdateLocal ();

Return local. tm_wday;

}

Int since1900 () {// Years since1900

UpdateLocal ();

Return local. tm_year;

}

Int month () {// Since January

UpdateLocal ();

Return local. tm_mon;

}

Int dayOfMonth (){

UpdateLocal ();

Return local. tm_mday;

}

Int hour () {// Since midnight, 24-hour clock

UpdateLocal ();

Return local. tm_hour;

}

Int minute (){

UpdateLocal ();

Return local. tm_min;

}

Int second (){

UpdateLocal ();

Return local. tm_sec;

}

};

# Endif // CPPTIME_H ///:~

Example:

 

//: C09: Cpptime. cpp

// From Thinking in C ++, 2nd Edition

// Available at http://www.BruceEckel.com

// (C) Bruce Eckel 2000

// Copyright notice in Copyright.txt

// Testing a simple time class

# Include "head. h"

# Include <iostream>

Using namespace std;

 

Int main (){

Time start;

For (int I = 1; I <1000; I ++ ){

Cout <I <'';

If (I % 10 = 0) cout <endl;

}

Time end;

Cout <endl;

Cout <"start =" <start. ascii ();

Cout <"end =" <end. ascii ();

Cout <"delta =" <end. delta (& start );

}///:~

 

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