English
- # include <stdio.h>
- # include <stdarg.h>
- double sum_series(int num, ...);
- int main()
- {
- double d;
- d = sum_series(4, 0.5, 0.25, 0.125, 0.0625);
- printf("Sum of series is %f.n", d);
- return 0;
- }
- double sum_series(int num, ...)
- {
- double sum = 0.0, t;
- va_list argptr;
- /* 初始化argptr */
- va_start(argptr, num);
- /* 计算序列之和 */
- for( ; num; num--)
- {
- t = va_arg(argptr, double);
- sum = sum + t;
- }
- va_end(argptr);
- return sum;
- }
