输入电阻值，计算出并联电阻、串联电阻

#include <stdio.h>

#include <stdlib.h>

int main()

{

    double z=9.0/5.0;

    double r1;

    double r2;

    printf("请输入两个电阻值:");

    scanf("%lf,%lf",&r1,&r2);

  printf("并联电阻为:%.2lf\n  串联电阻为:%.2lf\n",(r1*r2)/(r1+r2),r1+r2);

  return 0;

}