if-else-if梯形图的两个部分中的条件语句为true [英] Conditional statement true in both parts of if-else-if ladder

问题描述

如果您具有这样的代码：

If you have code like this:

if (A > X && B > Y)
{
   Action1();
}
else if(A > X || B > Y)
{
   Action2();
}

带有 A> X 和 B> Y ，是否会执行 if-else-if 阶梯的两个部分？

With A > X and B > Y, will both parts of the if-else-if ladder be executed?

我正在处理存在此问题的Java代码。我通常使用C ++进行工作，但是是使用这两种语言编写的非常新的（和零星的）程序员。

I'm dealing with Java code where this is present. I normally work in C++, but am an extremely new (and sporadic) programmer in both languages.

推荐答案

不，他们不会两者都执行。顺序取决于您的编写方式，从逻辑上讲这很有意义；即使第二个读为 else if，您仍然可以将其视为 else。

No, they won't both execute. It goes in order of how you've written them, and logically this makes sense; Even though the second one reads 'else if', you can still think of it as 'else'.

考虑一个典型的if / else块：

Consider a typical if/else block:

if(true){
   // Blah
} else{
   // Blah blah
}

如果您的第一句话是正确的，那么您甚至不必费心查看需要做什么在其他情况下，因为它无关紧要。同样，如果您使用的是 if / elseif，则不会浪费时间查看后续块，因为第一个是正确的。

If your first statement is true, you don't even bother looking at what needs to be done in the else case, because it is irrelevant. Similarly, if you have 'if/elseif', you won't waste your time looking at succeeding blocks because the first one is true.

一个现实的例子可能是分配成绩。您可以尝试以下操作：

A real world example could be assigning grades. You might try something like this:

if(grade > 90){
   // Student gets A
} else if(grade > 80){
   // Student gets B
} else if(grade > 70){
   // Student gets c
}

如果学生获得99％，则所有这些条件都是正确的。但是，您不会分配学生A，B和C。

If the student got a 99%, all of these conditions are true. However, you're not going to assign the student A, B and C.

这就是为什么订单很重要的原因。如果我执行此代码，并将B块放在A块之前，则将为该同一学生分配B而不是A，因为不会执行A块。

That's why order is important. If I executed this code, and put the B block before the A block, you would assign that same student with a B instead of an A, because the A block wouldn't be executed.

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