Question

尝试在console中创建一个VSL studio 2012应用程序，根据用户输入的温度输出有关穿戴的建议，我遇到了错误

“无效的表达术语”

我在此代码中的所有其他if语句。我不知道我在这里做错了什么。

如果有人能指出我正在解决这个问题的方向，那就太棒了！谢谢

if (temp <= 40)
{
    Console.WriteLine(" It is very cold. Put on a heavy coat.");
}
else if (temp > 40 && <= 60)
{
    Console.WriteLine("It is cold. Put on a coat.");
}
else if (temp > 60 && <= 70)
{
    Console.WriteLine("The temperature is cool. Put on a light jacket.");
}
else if (temp > 70 && <= 80)
{
    Console.WriteLine("The temperature is pleasent. You can wear anything you like");
}
else if (temp > 80 && <= 90)
{
    Console.WriteLine(" The temperautre is warm, you can wear short sleeves.");
}
else (temp > 90)
{
    Console.WriteLine("It is hot. You can wear shorts today.");
}

Answer 1

这是无效的语法：

else if (temp > 40 && <= 60)

你需要这样做：

else if (temp > 40 && temp <= 60)

Answer 2

您写了无效的表达式：

(temp > 40 && <= 60)

格式正确：

(temp > 40 && temp <= 60)

请更正所有无效的表达方式。

Answer 3

像埃里克说的那样，你必须重复＆＃34;重复＆＃34;变量做另一个比较。你不能把＆＃34;否则＆＃34;接着是一个布尔表达式（否则应该只是＆＃34;否则{}＆＃34;），你应该把if放在if之后，就像那样：

代替

else (temp > 90)

使用

else if (temp > 90)

所以，你的整个代码应该是：

if (temp <= 40)
            {
                Console.WriteLine(" It is very cold. Put on a heavy coat.");
            }
            else if (temp > 40 && temp <= 60)
            {
                Console.WriteLine("It is cold. Put on a coat.");
            }
            else if (temp > 60 && temp <= 70)
            {
                Console.WriteLine("The temperature is cool. Put on a light jacket.");
            }
            else if (temp > 70 && temp <= 80)
            {
                Console.WriteLine("The temperature is pleasent. You can wear anything you like");
            }
            else if (temp > 80 && temp <= 90)
            {
                Console.WriteLine(" The temperautre is warm, you can wear short sleeves.");
            }
            else if (temp > 90)
            {
                Console.WriteLine("It is hot. You can wear shorts today.");
            }

If ... Else语句C＃中的表达式术语无效

3 个答案: