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#include <stdio.h>
#include <stdarg.h>
double sum_series(int num, ...);
/* Variable length argument example - sum a series. */
int main(void)
{
double d;
d = sum_series(5, 0.5, 0.25, 0.125, 0.0625, 0.03125);
printf("Sum of series is %f.\n", d);
return 0;
}
double sum_series(int num, ...)
{
double sum=0.0, t;
va_list argptr;
/* initialize argptr */
va_start(argptr, num);
/* sum the series */
for( ; num; num--) {
t = va_arg(argptr, double); /* get next argument */
sum += t;
}
/* do orderly shutdown */
va_end(argptr);
return sum;
}
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