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An enumerated type declares an optional type name and a set of zero or more identifiers that can be used as values of the type. Each enumerator is a constant whose type is the enumeration. For example, if you are creating an application that has a fixed number of types for some variable. For example, let's say gender, it can be of three types male, female and others. You can define and use an enum like −#include using namespace std; enum Gender {MALE, FEMALE, OTHERS}; int main() { Gender gen = Gender.FEMALE; return 0; }By default, the value ... Read More
There are two ways to set the path in java, First is Temporary Path and second is Permanent Path.Setting Temporary PathOpen command prompt in WindowsCopy the path of jdk/bin directory where java located (C:\Program Files\Java\jdk_version\bin)Write in the command prompt: SET PATH=C:\Program Files\Java\jdk_version\bin and hit enter command.Setting Permanent PathGo to My Computer ---> Right Click on it ---> Advanced System Settings ---> Advanced Tab ---> Click on Environment VariablesClick on New tab of User variables, assign value JAVA_HOME to Variable Namejava\jdk_version\bin path (copied path) to Variable Value and click on OK ButtonFinally, click on OK button.Read More
The multiplicative operators are −Multiplication (*)Division (/)Modulus or “remainder from division” (%)These binary operators have left-to-right associativity. The multiplicative operators take operands of arithmetic sorts. The modulus operator (%) contains a stricter requirement in this its operands should be of integral type.The multiplication operator yields the result of multiplying the first operand by the second.The division operator yields the result of dividing the first operand by the second.The modulus operator yields the remainder given by the subsequent expression, wherever e1 is that the 1st operand and e2 is that the second: e1 – (e1 / e2) * e2, where both ... Read More
Program comments are explanatory statements that you can include in the C++ code. These comments help anyone reading the source code. All programming languages allow for some form of comments.C++ supports single-line and multi-line comments. All characters available inside any comment are ignored by C++ compiler.Single line commentsTo create a single line comment, we use the // notation. Wherever you want to start the comment, start it with //. For example,// This is a comment cout
A fundamental or primitive type is a data type where the values that it can represent have a very simple nature (a number, a character or a truth-value); the primitive types are the most basic building blocks for any programming language and are the base for more complex data types.C++ has the following primitive data types −S.NoTypeDescription1boolStores either value true or false.2charTypically a single octet (one byte). This is an integer type.3intThe most natural size of an integer for the machine.4floatA single-precision floating point value.5doubleA double-precision floating point value.6voidRepresents the absence of type.Read More
The single operators operate on one quantity and following are the samples of single operators − - The increment ( ) and decrement (--) operators. The compiler distinguishes between the different meanings of an operator by examining the types of its operands.The unary operators operate on a single operand and following are the examples of Unary operators −The increment (++) and decrement (--) operators.The unary minus (-) operator.The logical not (!) operator.The unary operators operate on the object for which they were called and normally, this operator appears on the left side of the object, as in !obj, -obj, and ... Read More
The EXIT or QUIT commands take you returned to windows from MySQL command line tool.mysql> EXITORmysql> QUIT
After running a query, MySQL returns the number of rows and gives time in the output that shows how much it took for running that query. As for example, if we run the following querymysql> create table e1(id int); Query OK, 0 rows affected (0.23 sec)It is showing the time (0.23 sec).
Unary operator are operators that act upon a single operand to produce a new value. The unary operators are as follows −Indirection operator (*) - It operates on a pointer variable, and returns an l-value equivalent to the value at the pointer address. This is called "dereferencing" the pointer.Address-of operator (&) - The unary address-of operator (&) takes the address of its operand. The operand of the address-of operator can be either a function designator or an l-value that designates an object that is not a bit field and is not declared with the register storage-class specifier.Unary plus operator (+) - ... Read More
The :: (scope resolution) operator is used to get hidden names due to variable scopes so that you can still use them. The scope resolution operator can be used as both unary and binary.You can use the unary scope operator if a namespace scope or global scope name is hidden by an explicit declaration of the same name in a block or class. For example, if you have a global variable of name my_var and a local variable of name my_var, to access global my_var, you'll need to use the scope resolution operator. For example, Example#include using namespace ... Read More