Expression and their types in cpp, C/C++ Programming

Expression and their types:

An expression will be in form of mathematical expression with C++ syntax embedded

with it. Expressions are of following types which may be used in any combination.

Constant Expression:

int x;

x = 12 * (5 +7);

Integral Expression:

It is the expression used to create integer result.

int x;

x = 5.34 + int(4.23);

Float Expression:

It is the expression used to create floating point result.

float x;

x = 5.23 + float(4);

Pointer Expression:

It is the expression used to create address of a variable result. int x, *p;       p =&x;

 

Relational Expression:

It is the expression used to compare two variables or values. int x,y;

bool b;

b = true; b will be 1

b = false; b will be 0

b = x < y; //If x is less than y b =1 else 0

b = x ==y; // if x is equal to y than b =1 else 0 if (x

{ true block;

}

else

{false block;

 

}

Logical Expression:

It is the expression used to match up to two or more relational expression.

int x,y,z;

if (x

{ true block;

}

else

{false block;

}

Bitwise Expression:

It is the expression used to manipulate data at bit level.   It is used to multiply and divide x2

powers of 2.

x << 3;

y >> 2;

 

Special Assignment Expression: Chain Assignment:

int x = y =z =10; is wrong statement.

int x=y=z; is invalid statement Cannot assign as chain at declaration. int x, y, z =10;

x= y =z; The value of x and y is 10. x=y=z=20; This is valid statement. Embedded Assignment:

int x, y;

x = (y=10)+20;  The value of x will be 30 and y will be 10.

 

Compound Assignment:

It is similar to short hand operator expression in C.

x = x +y;

x +=y;

 

Implicit Expression:

Implicit mean hidden or clear or implied.  It is like to casting with little change.  The

conversion is done automatically without calling the cast.    The conversion will be from lower end to higher end, that integer can be change in to float.  To convert float to integer cast should be used. The variable must be casted independently i = float(a)/float(b);

x = 10 + 12.45;

Posted Date: 9/20/2012 7:38:53 AM | Location : United States







Related Discussions:- Expression and their types in cpp, Assignment Help, Ask Question on Expression and their types in cpp, Get Answer, Expert's Help, Expression and their types in cpp Discussions

Write discussion on Expression and their types in cpp
Your posts are moderated
Related Questions

A Network of routers have been configured for the purposes of handling data traffic within your company. You would like to have an application that does a network

What is the role of && operator in a program code? - && is also referred to as AND operator. - When this operator is used, all conditions specified should be TRUE before nex

Question Write a program using c++ for the above function , at a= 1000, b=10 -3 ,10 -2 ,10 -4

1. The main program must be in a file called A4.cpp 2. The data must be read in from a data file.  The user must enter the filename.  A sample data file will be provided on Mood

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Give practice in writing program''s..

how to write c++ code for financial system using class and object

How to use HTTP Headers inside PHP? Write the statement through which it can be added? HTTP headers can be used in PHP by redirection that is written as: Headers can be

6999066263304447777077766622337778 -----> message sent by the first smuggler. my name is robert---------> message decoded by the second smuggler. Where ‘0’ denotes the "space".