Semireglao para mis estudiantes !!

#include
#include

double average(double v1 , double v2,...);

int main()
{

printf("\n Average = %lf", average(3.5, 4.5, 0.0));
printf("\n Average = %lf", average(1.0, 2.0));
printf("\n Average = %lf\n", average(0.0,1.2,1.5));
}

double average( double v1, double v2,...)
{
va_list parg;
double sum = v1+v2;
double value = 0;
int count = 2;

va_start(parg,v2);

while((value = va_arg(parg, double)) != 0.0)
{
sum += value;
printf("\n in averge = %.2lf", value);
count++;
}
va_end(parg); /* End variable argument process */
return sum/count;
}


http://www.java2s.com/Code/C/Function/Calculatinganaverageusingvariableargumentlists.htm