sizeof

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C + + sizeof summary

The function of the keyword sizeof is to return the number of bytes of memory consumed by the object or type, and the return value is size_t.Number of bytes consumed by the base data type: (32-bit system)Char 1 bytesBOOL 1 bytesShort 2 bytesint 4

The misunderstood sizeof in C + +

The following is a detailed analysis of the sizeof in C/s + +, the need for friends under the reference Is 1:sizeof a function?What is the difference between 2:sizeof and strlen?What is the value of 3:sizeof (int) (*P)? Copy Code code as follows:

The difference and connection between sizeof and strlen

First, sizeofsizeof (...) is an operator, the typedef in the header file is unsigned int, and its value is calculated at compile time, and the parameters can be arrays, pointers, types, objects, functions, and so on.Its function is to ensure that

Sizeof (struct)

Sizeof is an operator that can be used for any variable name, type name, or constant value. It does not need parentheses when used for variable names (not array names) or constants. It works during compilation rather than runtime.This is the most

Differences and relationships between sizeof and strlen

I. sizeofSizeof (...) is an operator. In the header file, typedef is an unsigned Int. Its value is calculated after compilation. The parameter can be an array, pointer, type, object, function, etc.Its function is to obtain the maximum object size

How is sizeof implemented?

Http://blog.chinaunix.net/space.php? Uid = 20545494 & Do = Blog & id = 1929750 How is sizeof implemented? () Category: C & C ++ Sizeof, during compilation, searches for the symbol table, judges the type, and then selects the value based on the

To] parse sizeof in the C language

Analysis of sizeof in C languageFirst, the concept of sizeofsizeof is a single-eye operator of C, such as the other C language operators + + 、--. It is not a function. The sizeof operator is given in bytesThe storage size of its operands. The

Go How does sizeof (struct) in C + + calculate?

Copyright belongs to the original author, I just typesetting.1. The application of sizeof in the structure of the situationTake a look at the following structure:struct MYSTRUCT{ Double dda1; Char DDA; int type;};What happens when you use

"Reprint" The difference between strlen and sizeof

Self Summary:when sizeof is used, if the array variable is the size of the array variableChar a[10]; sizeof (a) =10If the pointer is a pointer size and the array variable is passed as a function parameter, it will degenerate into a pointer, and the

sizeof () and lstrlen () and strlen () differences

Strlen () is the byte length of the returned string,Lstrlen () is the character length of the returned string.This means that the second function may be the same as the first function result if the character units in the string are single-byte.In

Fundamentals of C + + programming (5) Use of sizeof

1. Knowledge points(1) sizeof is a single-head operation, not a function that gets the number of bytes in the memory space that the operand occupies.(2) The operand of sizeof can make the type name, or it can be an expression, if the type name is

The analysis of sizeof function in C + +--solving the problem of sizeof seeking structure size

The amount of memory that is consumed by different data types in C/All-in-one Char 1 1int 4 Most 4, a few 8Short 2 2Long 4 8Float 4 4Double 8 8Pointer 4 8(Units are bytes)struct (struct): More complex, alignment problem. Union (Union): The

Differences between strlen and sizeof

I. sizeofSizeof (...) isOperatorInstead of a function.A simple example:Int;Cout In the header file, typedef is unsigned int, and its value is calculated after compilation. The parameters can be arrays, pointers, types, objects, functions, etc.Its

The difference and connection between sizeof and strlen

The difference and connection between sizeof and strlenFirst, sizeof sizeof (...) is an operator, the typedef in the header file is unsigned int, and its value is calculated at compile time, and the parameters can be arrays, pointers, types, objects,

Sizeof has something to say: "You don't understand me"

First, let's make a multiple-choice question: Is sizeof a keyword or a function? See the following example: Int I = 0;A), sizeof (INT); B), sizeof (I); c), sizeof int; d), sizeof I;Undoubtedly, the value of a) and B in a 32-bit system is 4. What

"sizeof"

First, the concept of sizeofsizeof is a single-purpose operator of the C language, such as other C-language operators + + 、--such as It is not a function.The sizeof operator gives the storage size of its operands in bytes. Operands can beTo be an

SIZEOF CONST preprocessing topic:

SIZEOF CONST pretreatment Topics:1. SizeOf Related Series issues A. For struct S{char a;int B}; sizeof (s) = 8; Because when the element length in the structure is less than the number of processor bits (32 bits = 4 bytes), the longest data element

Analysis of the C/C ++ sizeof function -- solving the problem of sizeof finding the struct size

Analysis of the C/C ++ sizeof function -- solving the problem of sizeof finding the struct sizeThe memory occupied by different data types in C/C ++ is 32-bit, 64-bit, char 1 1 int 4, most 4, A few 8 short 2 2 long 4 8 float 4 4 double 8 8 pointers 4

You have to know the pointer base -4.sizeof to calculate the length of the array and the security issues of strcpy

First, using sizeof to calculate the array length 1.1 sizeof basic useIf the variable is declared as an array within the scope, you can use sizeof to find the array size, and the following code shows how to use sizeof: intNums[] = { One, A, -, -,

sizeof () Usage Summary

sizeof() Function: Calculates the number of bytes in a data space1. Compare strlen () with strlen () to calculate the number of characters in the character array to" /"To end the judgment, do not count as' /'the array element. sizeof calculates the

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