c - 串联/并联功能

Question

我不知道如何从一个函数中获取两个变量，这是我的菜鸟尝试，这可能吗？如果可以，它是如何完成的？

#include <stdio.h>
float seriesParallel (float r1, float r2);// function prototype
int main()
{
    float r1,r2,series,parallel;
    printf("Enters two numbers: ");
    scanf("%f %f",&r1,&r2);
    seriesParallel = seriesParallel(r1, r2);// function call
    printf("series = %f and parallel = %f", series, parallel);
    return 0;
}
float seriesParallel (float r1, float r2)// function definition
{
    float series, parallel;
    series = (r1 + r2);
    parallel = (r1 * r2) / (r1 +r2);
    return series;
    return parallel;

}

Answer 1

你有两个选择:

• 返回一个包含两个值的struct。

  struct Values { float series, parallel; }
  
  struct Values seriesParallel (float r1, float r2)
  {
      struct Values ret;
      ret.series = (r1 + r2);
      ret.parallel = (r1 * r2) / (r1 +r2);
      return ret;
  }
  

• 通过指针返回一些值。

  void seriesParallel (float r1, float r2, float* series, float* parallel)
  {
      *series = (r1 + r2);
      *parallel = (r1 * r2) / (r1 +r2);
  }