#44u61l5f :: scanf, printf와 같이 다수의 파라메터 처리 방법(MSDN)

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scanf, printf와 같이 다수의 파라메터 처리 방법(MSDN)
--------------------------------------------------------------------------------

#include
#include
void VarArg(LPCSTR formatstring, ...)
{
int nSize = 0;
char buff[255];
va_list args;
va_start(args, formatstring);

nSize = _vsnprintf( buff, sizeof(buff), formatstring, args);
}

void main() {
VarArg("%s World", "Hello");
}

From. MSDN

mk:@MSITStore:C:Program%20FilesMicrosoft%20Visual%20StudioMSDN2001OCT1033WCECRT.CHM::/htm/crt3_43.htm

______________________________________

/* VA.C: The program below illustrates passing a variable
* number of arguments using the following macros:
* va_start va_arg va_end
* va_list va_dcl (UNIX only)
*/

#include
#define ANSI /* Comment out for UNIX version */
#ifdef ANSI /* ANSI compatible version */
#include
int average( int first, ... );
#else /* UNIX compatible version */
#include
int average( va_list );
#endif

void main( void )
{
/* Call with 3 integers (-1 is used as terminator). */
printf( "Average is: %d
", average( 2, 3, 4, -1 ) );

/* Call with 4 integers. */
printf( "Average is: %d
", average( 5, 7, 9, 11, -1 ) );

/* Call with just -1 terminator. */
printf( "Average is: %d
", average( -1 ) );
}

/* Returns the average of a variable list of integers. */
#ifdef ANSI /* ANSI compatible version */
int average( int first, ... )
{
int count = 0, sum = 0, i = first;
va_list marker;

va_start( marker, first ); /* Initialize variable arguments. */
while( i != -1 )
{
sum += i;
count++;
i = va_arg( marker, int);
}
va_end( marker ); /* Reset variable arguments. */
return( sum ? (sum / count) : 0 );
}
#else /* UNIX compatible version must use old-style definition. */
int average( va_alist )
va_dcl
{
int i, count, sum;
va_list marker;

va_start( marker ); /* Initialize variable arguments. */
for( sum = count = 0; (i = va_arg( marker, int)) != -1; count++ )
sum += i;
va_end( marker ); /* Reset variable arguments. */
return( sum ? (sum / count) : 0 );
}
#endif

Output

Average is: 3
Average is: 8
Average is: 0

From. MSDN

mk:@MSITStore:C:Program%20FilesMicrosoft%20Visual%20StudioMSDN2001OCT1033vccore.chm::/html/_crt_va_arg.2c_.va_end.2c_.va_start.htm

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