sizeof

In-Depth Analysis of GESP Certification C++ Level 3 Questions (True/False) – September 2025

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1、Expression sizeof(‘a’) always results in 1 , because ‘a’ is a character. 【Analysis】 Answer：× Key Point：Type of character literal andsizeof behavior Analysis： InC++, the type of character literal‘a’ ischar,sizeof(char) guarantees1 However inC, character literals areint type,sizeof(‘a’) may be4 Since the question clearly states it isC++, the result is indeed1, but the statement“always“ is inaccurate, becauseC … Read more

Detailed Explanation of sizeof() Operator in C++

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Detailed Explanation of sizeof() Operator in C++

sizeof() is an operator used to compute the size of data types, constants, and variables. It is a compile-time operator because it returns the size of a variable or constant at compile time. The size calculated by the sizeof() operator is the amount of RAM space occupied in the computer. The syntax of the sizeof() … Read more

Detailed Explanation of sizeof() Operator in C Language

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Detailed Explanation of sizeof() Operator in C Language

In C language, the sizeof() operator is widely used. It is used to determine the number of storage units occupied by an expression or a specified data type, measured in the size of a char. The sizeof() operator includes one operand, which can be an expression or a type conversion, where the conversion is placing … Read more