hello,
I would to know if it is possible to call an object in a function within a
class.
Meaning , In a class, A function X calling onto a function Y, and function
Y we want one of the two calculation ( eg seconds , out of seconds and
minutes)
thanks ,
Ken
lerameur at yahoo.com
here is the program I wrote, but the function subtraction wich is calling
another function is not working, dont know how to access the info.
#include <iostream>
#include <conio.h> // Used in microsoft visual c++
using namespace std;
class Conversion
{
public:
void menu();
void sec_to_hours();
void time_to_seconds();
void substraction();
};
void Conversion::time_to_seconds() //Converts time to seconds
{ int seconds1, seconds2, hours, minutes, seconds;
char colon;
cout<<"Enter a time (hours:minutes:seconds): " ;
cin>> hours >>colon >>minutes >>colon >> seconds;
if ( hours >= 0 && hours < 24 ) seconds1 = hours * 3600 ;
else cout<<"Invalid amounts of hours " <<endl;
if ( minutes >= 0 && minutes < 60) seconds2 = minutes *60;
else cout<<"Invalid amount of minutes " <<endl;
if ( seconds >= 0 && seconds< 60) ;
else cout<<"Invalid amount of seconds " <<endl;
if ( ( hours >= 0 && hours < 24 ) && ( minutes >= 0 && minutes < 60) &&
( seconds >= 0 && seconds< 60) )
seconds = seconds1 + seconds2 + seconds ;
cout<< " There is: " << seconds <<" seconds." <<endl;
}
void Conversion::substraction()
{ int seconds ;//total_seconds;
time_to_seconds();
cout<<" Now enter the amount of seconds to subtract : " <<endl;
cin >> seconds ;
if ( time_calc.time_to_seconds() >= seconds)
cout<< " Substracting " << time_to_seconds.seconds <<" from " << seconds
<<" is: " << time_to_seconds().seconds - seconds ;
else
cout<< " The time has to be greater then the seconds. Please try again! "
;
}
void Conversion::menu()
{
int choice;
Conversion time_calc;
do {
cout << endl << endl;
cout << " Time Management System "<<endl;
cout << " ============================================== "<<endl;
cout << " 1: Convert a number of seconds into a time "<<endl;
cout << " 2: Convert a time into a number of seconds "<<endl;
cout << " 3: Substrat a number of seconds from a time "<<endl;
cout << " 4: Quit "<<endl;
cout << " ============================================== "<<endl;
cout << " Your choice please: ";
cin >> choice;
switch (choice)
{
case 1:
sec_to_hours();
break;
case 2:
time_calc.time_to_seconds();
break;
case 3:
time_calc.substraction();
break;
case 4: cout<<"Thank you for having used this system, Bye Bye!!!"; break;
default: cout<<"Error: Invalid option, Please try again" ;
}
} while (choice != 4);
}// end function menu
void sec_to_hours() //Conversion from seconds to hours and minutes
{ int seconds;
cout<<"Enter the number of seconds: " ;
cin>> seconds;
if (seconds >= 0 && seconds < 60)
cout<< "The number of seconds is " << seconds ;
else if (seconds >= 60 && seconds < 3600)
cout<< "There are " << seconds / 60 <<" minutes and " << seconds % 60
<<" seconds" ;
else if ( seconds >= 3600 && seconds < 86400 ) // 1 hours or more , 1 hour
= 3600 seconds
cout<< "There are " << seconds /3600 << " hours " << (seconds % 3600) /
60 <<" minutes " << seconds % 60 <<" seconds" ;
else if ( seconds >= 86400 ) //checking for days if seconds greater then
86400seconds ( 1 day)
{ cout<< "There is " << seconds / 86400 <<" days, " << (seconds % 86400)
/3600 << " hours " ;
cout<< ((seconds % 86400) %3600) / 60 <<" minutes " << (((seconds %
86400) %3600) % 60 ) %60 <<" seconds" ;
}
}
}; // end void time_to_seconds
void substraction()
{ int seconds, total_seconds;
time_to_seconds();
cout<<" Now enter the amount of seconds to subtract : " <<endl;
cin >> seconds ;
if ( time_to_seconds().seconds >= seconds)
cout<< " Substracting " << time_to_seconds.seconds <<" from " << seconds
<<" is: " << time_to_seconds().seconds - seconds ;
else
cout<< " The time has to be greater then the seconds. Please try again! "
;
}
void main()
{
Conversion time_calc;
time_calc.menu();
getch(); // Used in microsoft visual c++
}
