＃包括< studio.h> main（）{int x = 10，y;打印（“输入一个数字”）;扫描（“％d”，& x）; y = x ++ + ++ x + ++ x + ++ x + ++ x; print（" result：％d"，y）:; [英] #include<studio.h> main() { int x=10, y; print("enter a number"); scan ("%d", &x); y=x++ + ++x + ++x + ++x + ++x; print("result:%d", y):;

问题描述

对于手动计算得到64但在turbo C编译器得到70和在Java 64中它如何变化可以有人解释



我尝试过：



如果通过手动计算得到答案64取x = 10但是在编译器得到70怎么可能

解决方案

简单：为什么x = ++ x + x ++给我错误的答案吗？ [ ^ ]



顺便说一句：以后，请不要把你的代码作为主题 - 这就是我尝试过的东西。主题应该简短而甜蜜，并尽可能快速地用英语概述问题。也许x ++给出了错误答案或类似内容？

你处于灰色区域：代码合法，但不可预测。

 y = x ++ + ++ x + ++ x + ++ x + ++ x; 

编译器可以自由重新排序此代码中的内容。对于x = 10，
，y可以是50到75之间的任何值。

唯一的建议是：永远不要在一行代码中混淆多个递增/递减操作。

For manual calculation getting 64 but in turbo C complier getting 70 and in Java 64 how it varies can anyone explain

What I have tried:

If taking x=10 by doing the manual calculation getting the answer 64 but in complier getting 70 how is it possible

解决方案

Simple: Why does x = ++x + x++ give me the wrong answer?[^]

BTW: in future, don't put your code as the subject line - that's what "What I have tried" is there for. The subject line should be short and sweet, and quick overview of the problem in English as much as possible. Perhaps "x++ giving wrong answer" or similar?

You are in gray zone: the code is legal, but unpredictable.

y=x++ + ++x + ++x + ++x + ++x;

The compiler is free to reorder what is in this code.
for x=10, y can be anywhere between 50 and 75.
The only advice is: never mess with multiple increment/decrement operations in a single line of code.

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