#include <stdio.h>
#include <stdarg.h>

int doCallVaArg( int nArgCount, ... )
{
    va_list argList;
    int nSum = 0;
    va_start( argList, nArgCount );
    for( ;nArgCount > 0; --nArgCount )
    {
        nSum += va_arg( argList, int ); 
    }
    return nSum;
}

int main( int argc, char ** argv )
{
    int nSum = doCallVaArg( 5, 1, 2, 3, 4, 5 );
    printf( "Sum is %d\n", nSum );
    return 0;
}