C++ LANGUAGE LITERALS PAGE 23

COMPUTER LANGUAGES HTML,C,C++.JAVA,.NET AND MULTIMEDIA basics and programs click home button

C++ LANGUAGE LITERALS

LITERALS 

Constants refer to fixed values that the program may not alter 
and they are called literals. 
Constants can be of any of the basic data types and can be divided 
into Integer Numerals, Floating-Point Numerals, Characters, Strings 
and Boolean Values. 
Again, constants are treated just like regular variables except that 
their values cannot be modified after their definition. 


Integer Literals 


An integer literal can be a decimal, octal, or hexadecimal constant. 
A prefix specifies the base or radix: 0x or 0X for hexadecimal, 0 for 
octal, and nothing for decimal. 
An integer literal can also have a suffix that is a combination of U and L, 
for unsigned and long, respectively. The suffix can be uppercase or lowercase 
and can be in any order. 


Here are some examples of integer literals: 


212         // Legal 
215u        // Legal 
0xFeeL      // Legal 
078         // Illegal: 8 is not an octal digit 
032UU       // Illegal: cannot repeat a suffix 

Following are other examples of various types of Integer literals: 


85         // decimal 
0213       // octal 
0x4b       // hexadecimal 
30         // int 
30u        // unsigned int 
30l        // long