Assignment 2 Queries

Hi,

Can someone assist with assignment 2, question 3b?

The function seems to be easy but i just cannot get the formula for this function.

Something like this ....

Language: C++
int nrContainers(int numPack,int numFit)
{
  /* your code .........
     your code .........
     your code .........
     your code .........
  */  
  return numNeeded;  // where numNeeded is a variable of type int that you used in your code above
}

Okay, but would you need to declare "numNeed" as a local or global variable then?

Kronic

OK... the 2nd value parameter ( int numFit) you get from the answer in Q3a and the first value parameter you get from the input of the user in Q3b
Calculation within function int nrContainers would be something like this ...

Language: C++
int x  = nrToBepacked /  nrInEveryContainer;  // int division discards the remainder
//test to see if there is a remainder
//can';t have 1/2 of a container !!
if ( nrToBepacked %  nrInEveryContainer) > 0 
   x++;
 
return x

Hope this helps ?

Ahhh, the light just went on brighter now, thanks Wiseguy!

Kronic

nishkarb@nedbank.co.za Wrote:
-------------------------------------------------------
> Okay, but would you need to declare "numNeed" as a
> local or global variable then?


It's local within function int nrContainers BUT it gets assigned to the variable nrContainersNeeded when execution returns back to main
nrContainersNeeded = nrContainers(nrToBePacked, nrInEveryContainer);

Hi guys/gals,

I have a question on functions.

I have a function that has 2 variable parameters say (int x, y).
The function adds these 2 values up & gives you an output, say Z.

1. Where in the program do you decalre variable Z, in the function or main program?

2. If x & y takes on the values of variables in the main program (actual parameters to formal parameters), how does the program know which value should go to x and which to y?
Unless we use the same name variables as in the main program?

Kronic

Language: C++
//Simple function call with parameters
#include <iostream>
using namespace std;
 
//function prototype
int func(int x, int y);
 
//main program
int main()
{
  int n1, n2;
 
 
    cout << "Enter 2 integers" << endl;
    cin  >> n1 >> n2; 
 
  //calling function with parameters (n1 and n2) 
  // NB! The position of the parameters when the call is made !!
 
  cout << n1 << " + " << n2 << " = " <<  func (n1,n2) << endl;
 
 return 0;
}
 
//function implementation
int func(int x, int y)
{
 
  return ( x + y);
 
}
 
 
/* OR like this 
 
int func(int x, int y)
{
  int z;
  return (z = x + y);
 
}
*/

Hope this helps !!

Hi,

Does anyone know the difference between these 2 operators? :

" = "

" =="

Don't know when you use what.

Kronic

nishkarb@nedbank.co.za Wrote:
-------------------------------------------------------
> Hi,
>
> Does anyone know the difference between these 2
> operators? :
>
> " = "
>
> " =="
>
> Don't know when you use what.

"="
This operator is used to assign(allocate) data to a variable(can be of type int, char, etc) ; eg.
The above stores the number 5 in the variable of type int

Language: C++
int x = 5;

"=="
This operator compares; eg.

Language: C++
int x = 5;
 
if (x==6) then
 cout << " True"  << endl;
else
 cout << "False" << endl;

The output will be "False" since x is not 6 but 5 !
ie. for the operator to do what it's suppose to the variable x on the left of the ("==" ) must be intialised before.

Hope this makes sense

hmmm,

Ok thanks, i will use the "==" operator more when i perform condtions or something similiar.

Kronic

I lost a couple of marks using "=" in places where I should've used "==", but I still managed to get good marks.