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Transferred from: http://blog.chinaunix.net/uid-25909619-id-3032209.htmlWhen a struct type is defined in C, is its size equal to the sum of the fields (field) sizes? How will the compiler place these fields in memory? What are ANSI C requirements
These questions may be a little vague for many friends, so this article tries to explore the secrets behind them.
First of all, there is at least one thing to be sure that ANSI C guarantees that the positions of the fields in the structure are
[Reference from: http://blog.csdn.net/soloist/archive/2004/12/12/424717.aspx]
When a structure type is defined in C, is its size equal to the sum of the sizes of fields? How will the compiler place these fields in memory? What are the requirements
Qt Chinese garbled characters
For beginners of Linux, go to advanced QT programming. However, the first demoProgramI met Chinese garbled characters and sweated!
Environment:
1. RedHat As5
2. qt4.4.0
3. lang = "zh_cn.gb18030"
After reading an article today, I suddenly realized why sizeof () is always used in source code and why is it always important to emphasize byte alignment during embedded development in C, it turned out to be because of this. Here, I am ashamed.
[Intel architecture 32 manual]Words, dual words, and four words do not need to be aligned in the memory on the natural boundary. (For words, double words, and four words, the natural boundary is an even number of addresses, which can be divided by
An article about alignment is as follows:Note one or two:1. memory alignment: The computer system has limits on the location where basic data is stored in the memory. They will require that the first address value of the data be K (usually 4 or 8)
Q: What is an exception?A: The program may go wrong during execution and the run-time error is called an exception.By default, when a stored procedure runs out of error, the procedure terminates immediately and the system error message is
When a structure type is defined in C, is its size equal to the sum of the sizes of fields? How will the compiler place these fields in memory? What are the requirements of ansi c for the structure memory layout? Can our programs depend on this
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