if else语句循环或重复直到true

Question

如果投标金额少于所需金额，我不知道如何循环或重复cin >> cashTendered。

到目前为止，这就是我所拥有的。

if (cashTendered > || == total)
{
cout << "Your change is: $" << fixed << setprecision(2) << change << ".\n\n"
<< "Have a great day!\n\n\n\n\n";
}
else
{
cout << "You did not tender enough money to cover the total cost.\n"
<< "Please enter amount of cash tendered: $";
}

所以现在我想要if语句重复，直到为真。

有什么建议吗？

Answer 1

while(true)
{
   cin >> cashTendered
   if (cashTendered >= total)
   {
      cout << "Your change is: $" << fixed << setprecision(2) << change << ".\n\n"
      << "Have a great day!\n\n\n\n\n";
      break;
   }
   else
   {
      cout << "You did not tender enough money to cover the total cost.\n"
      << "Please enter amount of cash tendered: $";
   }
}

Answer 2

看看loops in c++。此外，如果条件可以缩短为>=而不是> || ==。此外，既然你想重复，直到cashTendered为＆gt; = total，你需要一个循环来检查条件，如果cashTendered是＆lt;总

while (cashTendered < total)
{
  cout << "You did not tender enough money to cover the total cost.\n"
  << "Please enter amount of cash tendered: $";
  cin >> cashTendered;
}
cout << "Your change is: $" << fixed << setprecision(2) << change << ".\n\n"
<< "Have a great day!\n\n\n\n\n";