struct size is different from typedef version?

Posted by samoz on Stack Overflow See other posts from Stack Overflow or by samoz
Published on 2010-05-06T03:41:30Z Indexed on 2010/05/06 3:48 UTC
Read the original article Hit count: 220

Filed under:

c

|

struct

I have the following struct declaration and typedef in my code:

struct blockHeaderStruct {
    bool allocated;
    unsigned int length;
};
typedef struct blockHeaderStruct blockHeader;

When I do sizeof(blockheader), I get the value of 4 bytes back, but when I do sizeof(blockHeaderStruct), I get 8 bytes.

Why is this happening? Why am I not getting 5 back instead?

Related posts about struct

copying a struct with a struct member to another struct

as seen on Stack Overflow - Search for 'Stack Overflow'
is the following code correct? typedef struct { int x; int y; } OTHERSTRUCT; struct DATATYPE { char a; OTHERSTRUCT b; } // ... // now we reserve two structs struct DATATYPE structA; struct DATATYPE structB; // ... probably fill insome… >>> More
Error in installing ZTE AC2738 on ubuntu 3.0.0-12-generic

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I am getting this error ,struct usb_serial_driver has no member named shutdown. I am installing on 64bit ubuntu 3.0.0-12-generic ... Beginning Verify CD ... ... Verify CD Succeed! ... Beginning Copy Install Package Files ... ... will take a long time, waiting 5 seconds, please ... Copy Install… >>> More
Core-audio - constructing an AudioBufferList struct (Q about c struct definition)

as seen on Stack Overflow - Search for 'Stack Overflow'
The definition of AudioBufferList looks weird to me… i guess my C is not so good struct AudioBufferList { UInt32 mNumberBuffers; AudioBuffer mBuffers[kVariableLengthArray]; }; typedef struct AudioBufferList AudioBufferList; Why AudioBuffer mBuffers[kVariableLengthArray]; and not AudioBuffer… >>> More
Union struct produces garbage and general question about struct nomenclature

as seen on Stack Overflow - Search for 'Stack Overflow'
I read about unions the other day( today ) and tried the sample functions that came with them. Easy enough, but the result was clear and utter garbage. The first example is: union Test { int Int; struct { char byte1; char byte2; char byte3; char byte4; … >>> More
flexible length struct array inside another struct using C

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I am trying to use C to implement a simple struct: 2 boxes, each contains different number of particles; the exact number of particles are passed in main(). I wrote the following code: typedef struct Particle{ float x; float y; float vx; float vy; }Particle; typedef struct Box{ … >>> More

Developer IT

struct size is different from typedef version? - Developer IT

struct size is different from typedef version?

c

struct

Related posts about c

Related posts about struct

copying a struct with a struct member to another struct

Error in installing ZTE AC2738 on ubuntu 3.0.0-12-generic

Core-audio - constructing an AudioBufferList struct (Q about c struct definition)

Union struct produces garbage and general question about struct nomenclature

flexible length struct array inside another struct using C

Categories cloud