c++ - 我的值不断增加，而不是在我的循环语句中重置

Question

我不确定我的某个公式是否有误，是我把某些东西放在了错误的区域，还是我完全遗漏了某些东西。但是当我运行编。它会把前一张顾客餐 table 的餐费加起来，而不是为每张新餐 table 重新设置。有帮助吗？

int main ()
{    
  //These are the variables used for the formulas and inputs.
  int people, counter;
  float price, subtotal, tip, tax, total;
  cout<<"How many people are at the table?" <<endl;
  cin>>people;
  //Use a while statement to start a loop
  while (people!=0)
   {
  //Use a for statement inside the while to make a nested loop. It will ask the price of each meal.
  for(counter=1; counter<=people; counter++)
    {
      cout<<"How much is the meal?: " <<endl;
      cin>>price;
        subtotal+=price;
        tax=subtotal*.06;
      if (people<5)
        {
          tip=subtotal*.18;
        }
      else
      tip=subtotal*.20;
      total=tax+subtotal+tip;

    }
  //This is the final output for the program. Which will be the bill.
  cout<<setprecision(2) <<fixed;
  cout<<left;
  cout<<setw(20)<<"Subtotal: " <<"$" <<subtotal <<endl;
  cout<<setw(20)<<"Sales Tax: " <<"$" <<tax <<endl;
  cout<<setw(20)<<"Tip: " <<"$" <<tip <<endl;
  cout<<setw(20)<<"Total: " <<"$" <<total <<endl;
  cout<<" " <<endl;
  cout<<setw(20)<<"How many people are at the table?" <<endl;
  cin>>people;

   }

Answer 1

您想在 while 循环内和 for 之前将所有变量重置为 0，尤其是 subtotal