Jan 9, 2014 · size_t N = 10; char *a = new char[N]; Now you can get the size of the allocated array. std::cout << "The size is " << N << std::endl; Many mentioned here C standard function std::strlen. But it does not return the actual size of a character array. It returns only the size of stored string literal.

Dec 27, 2013 · The minimum size of a char array would be 1 byte which would be empty i.e. contain only \0 1 null byte. c strings i.e char arrays always end in \0 (null byte) so a char array with 5 letters would be 5 letters plus the null byte equals 6 bytes. One could initialize a char array with 5 bytes which would only fit 4 letters plus the null byte.

Such literal has type char and the value equal to the representation of c-char in the execution character set. If c-char is not representable as a single byte in the execution character set, the literal has type int and implementation-defined value. So, in C++ character literal is a type of char. so, size of character literal in C++ is one byte.

Sep 10, 2012 · 4 isn't the size of the string, because samplestring isn't a string. It's a char*, whose size is (on your platform) 4, divided by 1 (size of char) is, correctly, 4. In C++, you'd use std::string and the length() method. In C, you'd use strlen which takes as parameter a …

May 7, 2015 · char name[]="123\0"; char name1[]="1234\0"; Hence, the size is always plus one. Keep in mind when reading strings from files or from whatever source, the variable where you store your string, should always have extra space for the null terminating character.

Aug 10, 2010 · sizeof(char) == 1 tells you that a char is eight bits (one byte) long. All of the fundamental data types in C are at least one byte long. Your structure returns a size of 8. This is a sum of three things: the size of the int, the size of the char (which we know is 1), and the size

There are some great answers here but I wanted to point out the jvm is free to store a char value in any size space >= 2 bytes. On many architectures there is a penalty for performing unaligned memory access so a char might easily be padded to 4 bytes. A volatile char might even be padded to the size of the CPU cache line to prevent false sharing.

Nov 18, 2016 · char* is a pointer to a char. You are misinterpreting char* as a "type" by itself. char is size 1, and char* which is a pointer can be 4 on 32 bit systems and 8 on 64bit system (provided it is compiled as per the system).

It also says, “The sizeof operator yields the size (in bytes) of its operand,” and “When applied to an operand that has type char... the result is 1.” It also specifies the CHAR_BIT macro as the “number of bits for smallest object that is not a bit-field (byte)”, in case you want to convert from native bytes to octets.

May 15, 2015 · The operand of sizeof can either be the parenthesized name of a type or an expression but in any case, the size is determined from the type of the operand only. sizeof s1 is thus stricly equivalent to sizeof (char[20]) and returns 20. sizeof s is stricly equivalent to sizeof (char*) and returns the size of a pointer to char (64 bits in your case).