Материал из C\C++ эксперт
Using variable-length argument lists
#include <iostream>
using std::cout;
using std::endl;
using std::ios;
#include <iomanip>
using std::setw;
using std::setprecision;
using std::setiosflags;
using std::fixed;
#include <cstdarg>
using std::va_list;
double f( int, ... );
int main()
{
double double1 = 3.5;
double double2 = 2.5;
double double3 = 1.7;
double double4 = 1.2;
cout << f( 2, double1, double2 ) << endl
<< f( 3, double1, double2, double3 ) << endl
<< f( 4, double1, double2, double3, double4 ) << endl
<< endl;
return 0;
}
double f( int count, ... )
{
double total = 0;
va_list list; // for storing information needed by va_start
va_start( list, count );
for ( int i = 1; i <= count; i++ )
total += va_arg( list, double );
va_end( list );
return total;
}6
7.7
8.9
