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.
这篇关于if-else-if梯形图的两个部分中的条件语句为true的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!