Decision statments

Oct 11, 2012 at 5:55am
pinko (13)
call charging program using logical, arithmetic operators and decision statements if, if else, nested if, nested if else,:
if
call start from 8:00am - 19:59pm
call charges = 5rs

if
call start from 20:00pm - 07:59am
call charges = 3rs

what will be the call charges if call start from 19:45 and end at 20:15
???????

need code
Last edited on Oct 17, 2012 at 9:39am
Oct 11, 2012 at 6:01am
TheIdeasMan (6847)
need code


You need to write code, not us.
Oct 17, 2012 at 9:30am
pinko (13)
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#include<iostream.h>
main()
{
 	  int startingHour, startingMint, callDuration,totalCharges, totalMint;
 	  
 	  cout<< "enter Starting hour	";
 	  cin>> startingHour;
 	  cout<<"\n";
 	  
 	  cout<< " enter starting minute	";
 	  cin>> startingMint;
 	  cout<<"\n";
 	  
 	  cout<< " enter call duration		";
 	  cin>> callDuration;
 	  cout<<"\n";
 	  
 	  if( startingHour >= 8 && startingHour <=19)
 	  {
	   	  totalMint = startingMint + callDuration;
		  
		  if ( totalMint>= 60)
		  {
		   	   startingHour + 1;
		   	   }
		   	   if( startingHour >= 20)
		   	   {
			   	   totalCharges = (59 - startingMint)*5 +(totalMint - 59)*3; 
  	   				}
 			   else 
				{
				 	totalCharges =   callDuration * 5;
			 		} 
 	  		}
 	  else
 	  {
	   	  
	   	   if( startingHour >= 20 && startingHour <=7)
 	  	   {
		   	   
	   	  	   totalMint = startingMint + callDuration;
		  
 		  	   if ( totalMint>= 60)
 			   {
			   	  	
   	   		 		startingHour + 1;
		   	   		 }
	   	  		   	 if( startingHour >= 20)
		   	   		 {
	  	 			  	 totalCharges = (59 - startingMint)*3 +(totalMint - 59)*5; 
  	   					 }
			 		 else 
						 {
						  	  totalCharges =   callDuration * 3;
							  } 
		  }	
		  	}

 	   	   	cout<< " total charges = " <<totalCharges;


}
Edit & run on cpp.sh



this is the code but the else portion is not working it showing output 0

enter starting hour = 1
enter starting minute = 4
enter call duration = 2

total charges = 0



kindly highlight the ERROR
Oct 17, 2012 at 10:17am
Moschops (7244)
if( startingHour >= 20 && startingHour <=7)

Can you think of any value of startingHour which is bigger than 20 AND less than 7? I can't.

Which bit of code do you think is supposed to be run when you enter 1 as the starting hour? You have not written any code for that.


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#include<iostream.h>
main()
Edit & run on cpp.sh
This has not been C++ since before 1998. You should get a new, correct C++ compiler for free instead of whatever 20 year old mess you're using.

Last edited on Oct 17, 2012 at 10:17am
Oct 17, 2012 at 3:35pm
pinko (13)
if( startingHour >= 20 && startingHour <=7)

i am using the 24 hour format and condition is

if
call start from 20:00pm - 07:59am
call charges = 3rs

and i found 1 mistake after correcting it still not working

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#include<iostream.h>
main()
{
 	  int startingHour, startingMint, callDuration,totalCharges, totalMint;
 	  
 	  cout<< "enter Starting hour	";
 	  cin>> startingHour;
 	  cout<<"\n";
 	  
 	  cout<< " enter starting minute	";
 	  cin>> startingMint;
 	  cout<<"\n";
 	  
 	  cout<< " enter call duration		";
 	  cin>> callDuration;
 	  cout<<"\n";
 	  
 	  if( startingHour >= 8 && startingHour <=19)
 	  {
	   	  totalMint = startingMint + callDuration;
		  
		  if ( totalMint>= 60)
		  {
		   	   startingHour + 1;
		   	   }
		   	   if( startingHour >= 20)
		   	   {
			   	   totalCharges = (59 - startingMint)*5 +(totalMint - 59)*3; 
  	   				}
 			   else 
				{
				 	totalCharges =   callDuration * 5;
			 		} 
 	  		}
 	  else
 	  {
	   	  
	   	   if( startingHour >= 20 && startingHour <=7)
 	  	   {
		   	   
	   	  	   totalMint = startingMint + callDuration;
		  
 		  	   if ( totalMint>= 60)
 			   {
			   	  	
   	   		 		startingHour + 1;
		   	   		 }
	   	  		   	 if( startingHour >= 21)
		   	   		 {
	  	 			  	 totalCharges = (59 - startingMint)*3 +(totalMint - 59)*5; 
  	   					 }
			 		 else 
						 {
						  	  totalCharges =   callDuration * 3;
							  } 
		  }	
		  	}

 	   	   	cout<< " total charges = " <<totalCharges;


}
Edit & run on cpp.sh
Oct 17, 2012 at 3:45pm
Moschops (7244)
if( startingHour >= 20 && startingHour <=7)


24 hour clocks have nothing to do with this.

Tell me a value for startingHour that you think will make this if block run, and I'll explain why it's wrong. This if block will never run. Never ever ever.
Oct 17, 2012 at 3:46pm
pinko (13)
suppose startingHour =1
Oct 17, 2012 at 3:50pm
pinko (13)
which compiler i should use. my instructor is gave me this. i am using bloodshed DEV-C++
Oct 17, 2012 at 3:50pm
Moschops (7244)
suppose startingHour =1


Okay. So, is this true?
startingHour >= 20 No, startingHour is NOT 20 or more.

Is this true?
startingHour <=7 Yes, startingHour is 7 or less.

So are they BOTH true? No.
So is this true?
startingHour >= 20 && startingHour <=7 No, because this will only be true when they are BOTH true.

Pick another number that you think will make startingHour >= 20 && startingHour <=7 true and I will explain why it does not.
Last edited on Oct 17, 2012 at 3:50pm
Oct 17, 2012 at 3:50pm
Moooce (216)
is 1 greater than 20?


damn, Moschops'ed...
Last edited on Oct 17, 2012 at 3:51pm
Oct 17, 2012 at 3:53pm
pinko (13)
Moschops i got it. can i use OR operator instead of AND??????
Oct 17, 2012 at 3:53pm
Moschops (7244)
Can you?????? We're not here to do your homework for you.
Last edited on Oct 17, 2012 at 3:54pm
Oct 17, 2012 at 3:54pm
pinko (13)
if( startingHour <= 20 && startingHour >=7) i think this is the true statment. but its also not working
Last edited on Oct 17, 2012 at 3:56pm
Oct 17, 2012 at 3:59pm
pinko (13)
m not saying to do my home work i am asking for suggestion. well thanks dude :-)
Oct 17, 2012 at 4:01pm
Moooce (216)
if :

if( startingHour >= 8 && startingHour <=19)

give you one charge, what descision has been made about the other charge?

(hint : i'll charge you this, else i'll charge you that)
Oct 17, 2012 at 4:05pm
pinko (13)
Moooce

other charges are applying in 
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if( startingHour >= 8 && startingHour <=19)
 	  {
	   	  totalMint = startingMint + callDuration;
		  
		  if ( totalMint>= 60)
		  {
		   	   startingHour + 1;
		   	   }
		   	   if( startingHour >= 20)
		   	   {
			   	   totalCharges = (59 - startingMint)*5 +(totalMint - 59)*3; 
  	   				}
 			   else 
				{
				 	totalCharges =   callDuration * 5;
			 		} 
 	  		}



but the code for these charges is not working
f
call start from 20:00pm - 07:59am
call charges = 3rs


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else
 	  {
	   	  
	   	   if( startingHour >= 20 || startingHour <=7)
 	  	   {
		   	   
	   	  	   totalMint = startingMint + callDuration;
		  
 		  	   if ( totalMint>= 60)
 			   {
			   	  	
   	   		 		startingHour + 1;
		   	   		 }
	   	  		   	 if( startingHour >= 8)
		   	   		 {
	  	 			  	 totalCharges = (59 - startingMint)*3 +(totalMint - 59)*5; 
  	   					 }
			 		 else 
						 {
						  	  totalCharges =   callDuration * 3;
							  } 
		  }	
		  	}



i am unable to find what will be the right statment in if( startingHour >= 20 || startingHour <=7)
Last edited on Oct 17, 2012 at 4:14pm
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