C / C++ / MFC

Joel Holdsworth wrote:

integer n that I can multiply the rational number x by so that y also becomes an integer

y = x * n

int gcd(int a, int b)
{
	for ( ;; )
	{
		if (a==0)
		{
			return (b<0) ? -b : b;
		}
		b %= a;
 
		if (b==0)
		{
			return (a<0) ? -a : a;
		}
		a %= b;
	}
}

n = i2/gcd(i1, i2)

string strArr;<br />
<br />
AddItem(unsigned short*,string StrToPass);

AddItem(unsigned short*,string *StrToPass,int Size); //f. declaration<br />
string *strArr; //pointer to the strings declaration<br />
.<br />
.<br />
.<br />
int Size=30; //string Array's Size<br />
.<br />
.<br />
.<br />
strArr = new string [Size]; //allocating new array of strings<br />
.<br />
.<br />
.<br />
AddItem(...,strArr,Size); //passing string's array to the function <br />
                          //with it's actual size<br />
.<br />
.<br />
.<br />
delete [] strArr; //if you don't need the array you have to delete it <br />
    //and allocate a new one with different size<br />
strArr=NULL;  //setting the pointer to NULL for safety after <br />
              //deleting it

Newbie00 wrote:

I've to admit, I don't understand your problem.

AddItem(char*,...)

 AddItem("one","two")/pre>
if the number of values are 3 then i need to write as
<pre> AddItem("one","two","three")

switch(noOfVals)
{
 case 1: AddItem(strArr.GetAt(0));
 case 2: AddItem(strArr.GetAt(0),strArr.GetAt(1));
.... and so on
}

char **StrArr;<br />
int Size1=30,Size2=10 //lets say you want to keep 30 strings for <br />
//example<br />
StrArr= new char*[30]; //define array of 30 pointers to char so 30 <br />
//strings <br />
<br />
for(int i=0;i<30;i++)<br />
 StrArr[i]=new char[Size2]; //allocating memo for each string which <br />
   //length==10

void function (char *Str1="",char *Str2="",char *Str3="",char *Str4="") /*f. declaration with default parameters set to ""*/<br />
<br />
//now if you want to run the function you can call it like this:<br />
function("blablaba"); //that means only first parameter will <br />
//contain "blablaba" string and remaining 3 will contain "" <br />
//string

OnButtonSubmit()
{
 int count = GetItemCount();
 CStringArray strArr;
 for(int index=0;index ...
 {
    strArr.Add(db.GetColumnValue(index));
 }
 
 AddItem(strArr);
}
 
AddItem(CStringArray &strArr)
{
 for (int i = 0; i < strArr.GetCount(); ++i)
 {
   // do something with strArr[i] here
 }
}