Sign In Sign-Up

Welcome!

Close

Would you like to make this site your homepage? It's fast and easy...

Yes, Please make this my home page!

No Thanks

  Don't show this to me again.

Close

Summary

• An international standard for the C++ language is soon to be produced. This will make programs written in standard obeying C++ capable of being transported from one computer to another.

• All C++ programs must include a function main().

• All executable statements in C++ are terminated by a semi-colon.

• Comments are ignored by the compiler but are there for the information of someone reading the program. All characters between // and the end of the line are ignored by the compiler.

• All variables and constants that are used in a C++ program must be declared before use. Declaration associates a type and an identifier with a variable.

• The type int is used for whole numbers which are represented exactly within the computer.

• The type float is used for real (decimal) numbers. They are held to a limited accuracy within the computer.

• The type char is used to represent single characters. A char constant is enclosed in single quotation marks.

• Literal strings can be used in output statements and are represented by enclosing the characters of the string in double quotation marks ".

• Variables names (identifiers) can only include letters of the alphabet, digits and the underscore character. They must commence with a letter.

• Variables take values from input when included in input statements using cin >> variable-identifier.

• The value of a variable or constant can be output by including the identifier in the output list cout << output-list. Items in the output list are separated by <<.