C / C++ / MFC

krish_kumar wrote:

case 0 :
for (.. ; condition 1 ; ..)

krish_kumar wrote:

That's why I tried for a #define Macro. ????

#include <iostream>

int GetNextPrime(int iStartNum)
{
	int i, j;
	int i_count;
	for(i = iStartNum; ; i++) {
		for(j = 1, i_count = 0; j <= i ; j++) {
			if( (i % j) == 0 )
				++i_count;
		}
		if(i_count <= 2) {
			return i;
		}
	}
	return 0;
}

void main()
{
	int i_choice;
	int i_count;
	int i_count_1 = 0;
	int i_number = 10;
	int i, j;
	int iValNow;
	int count;

	printf("Find prime nos up to %d (press 1), or %d prime nos (press 0) ", i_number, i_number);
	scanf("%d", &i_choice);


	// ---------------------------------------------------------
	printf("\n My version: \n");
	switch(i_choice)
	{
	case 0 :	// N count.
		for(i = 0, iValNow = i, count = 0; count < i_number; i++, count++) {
			iValNow = GetNextPrime(iValNow +1);
			printf("\t %d \n", iValNow);			
		}
		break;
	case 1 :	// up to N.
		for(iValNow = 0; ; ) {
			iValNow = GetNextPrime(iValNow +1);
			if(iValNow > i_number) {
				break;
			}
			printf("\t %d \n", iValNow);
		}
		break;
	}

	// ---------------------------------------------------------
	printf("\n Your version: \n");

	switch(i_choice)
	{
	case 0 :	// N count.
		for(i = 1, i_count = 0; i_count_1 < i_number; i++ ) {
			for(j = 1,i_count = 0; j <= i ; j++) {
				if( (i % j) == 0 )
					++i_count;
			}
			if(i_count <= 2) {
				printf("\t %d \n",i);
				i_count_1++;
			}
		}
		break;

	case 1 :	// up to N.
		for(i = 1, i_count = 0 ; i <= i_number; i++ ) {
			for(j = 1, i_count = 0; j <= i ; j++) {
				if( (i % j) == 0 )
					++i_count;
			}
			if(i_count <= 2) {
				printf("\t %d \n",i);
				i_count_1++;
			}
		}
	}
}

krish_kumar wrote:

But my code is repeating twice ...I wanna avoid that....

Amir_m wrote:

Is there any way to execute XQuery through MFC Code...

class CMyAppDlg : public CDialog
{
	MSXML2::IXMLDOMDocumentPtr m_pXMLDoc;
	_RecordsetPtr m_pRs;//PRs is a ADO record set

	....
};

CString fileName(_T("C:\test.xml"));
m_pXMLDoc->load(fileName.AllocSysString());


//so I am looking for a method like
m_pRs m_pXMLDoc->ExecuteXQuery(_T("My XQuery Statement"));

SummerBulb wrote:

while (read(fd[0],buf,50) != 0)
{
printf("Read line...\n");
buf[50] = NULL;
printf(buf);
write(fileOpen, buf, 50)

CPallini wrote:

SummerBulb wrote:
while (read(fd[0],buf,50) != 0)
{
printf("Read line...\n");
buf[50] = NULL;
printf(buf);
write(fileOpen, buf, 50)



You're assuming the read function return either 0 or 50. This is a wrong assumption.

while (read(fd[0],buf,50) > 0)

CPallini wrote:

BTW Haven't you any synchronization requirement (for instance, it is ok if in the output file the content of the three input files is scrambled?)?

• read return value is -1.
• read return value is positive, but less than 50.

while ( ! finished )
{
  ssize nread = read(fd[0],buf,50);
  if ( nread == -1 )
  {
    // handle error
  }
  else if (nread > 0)
  {
    printf("Read %d characters\n", nread);
    buf[nread]='\0';
    printf(buf);
    write(fileOpen, buf, nread);
  }
}

CPallini wrote:

For instance


while ( ! finished )
{
ssize nread = read(fd[0],buf,50);
if ( nread == -1 )
{
// handle error
}
else if (nread > 0)
{
printf("Read %d characters\n", nread);
buf[nread]='\0';
printf(buf);
write(fileOpen, buf, nread);
}
}

CPallini wrote:

where finished is a termination condition (timeout?) that you possibly know better than me.