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Operators

Operator in Cpp programming language

Operator in Cpp programming language

We will learn about Operator in Cpp programming language. C++ provides a rich set of the operator to manipulate variables. We can divide all the C++ operators into the following groups:

Operators in C++
  • Arithmetic Operators
  • Assignment Operators
  • Relational Operators
  • Unary Operator
  • Logical Operators
  • Bitwise Operator

C++ Arithmetic Operators

Arithmetic operators are used to calculating mathematical expressions in the same way that they are used in algebra. The following table list the arithmetic operators

[wp_table id=6914/]

Program 1

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int a,b,c,d,e,f,g;
    a=20,b=12;
    c=a+b;
    d=a-b;
    e=a*b;
    f=a/b;
    g=a%b;
    cout << "a+b is :"<<c << endl;
    cout << "a-b is :"<<d << endl;
    cout << "a*b is :"<<e << endl;
    cout << "a/b is :"<<f << endl;
    cout << "a%b is :"<<g << endl;
    getch();
    return 0;
}

When we executed above program, it will be produced following result

a+b is : 32
a-b is : 8
a*b is : 240
a/b is : 1
a%b is : 8

 

C++ Assignment Operator

In C++ Programming, the assignment operator is used for assigning a significant value to a variable. Equal to(=) is a mostly known assignment operator in algebra.

The following table list the assignment operators in C language

[wp_table id=6919/]

Program 1

#include <iostream>

using namespace std;

int main()
{
    int a=12,b;
    b = a;
    cout << "In b=a,b value is:"<<b<< endl;
    b += a;
    cout << "In b+=a,b value is:"<<b<< endl;
    b -= a;
    cout << "In b-=a,b value is:"<<b<< endl;
    b *= a;
    cout << "In b*=a,b value is:"<<b<< endl;
    b /= a;
    cout << "In b/=a,b value is:"<<b<< endl;
    b %= a;
    cout << "In b/=a,b value is:"<<b<< endl;
    return 0;
}

 

 

When we execute the above program, it will be produced the following result

In b=a,b value is: 12
In b+=a,b value is: 24
In b-=a,b value is: 12
In b*=a,b value is: 144
In b/=a,b value is: 12
In b/=a,b value is: 0

 

C++ Relational Operators

A relational operator compares the relationship between two variables(operands). relational operators perform based on boolean expression and return either true(1) or false(0).

The following table list the relational operators in C++ language

[wp_table id=6923/]

Program 1

#include <iostream>

using namespace std;

int main()
{
    int a=20,b=30;
    if(a<b){
    cout << "a is less than b" << endl;
    }
    if (a>b){
    cout << "a is greater than b" << endl;
    }
    if (a>=b){
    cout << "a is greater than or equal to b" << endl;
    }
    if (a<=b){
    cout << "a is less than or equal to b" << endl;
    }
    if(a==b){
    cout << "a is equal to b" << endl;
    }
    return 0;
}

When we execute the above program, it will be produced the following result

a is less than b
a is less than equal to b

 

C++ Unary Operator

The following table list the unary operators in C language

[wp_table id=6924/]
[wp_table id=6926/]

Example

#include <iostream>

using namespace std;

int main()
{
    //postfix
    //int x=1
    //int y=x++ , y=1;
    //int z=x , z=2

    //Example
    cout << "Post increment" << endl;
    int x=1;
    cout << "x value is :" <<x<< endl;
    int y=x++;
    cout << "y value after x++ is :" <<y<< endl;
    cout << "x value after x++ is :" <<x<< endl;
    return 0;
}

 

Program 1 – post-increment

When we executed above program, it will be produced following result

post increment
x value is :1
y value after x++ is :1
x value after x++ is :2

 

 

Program 2 – pre-increment

#include <iostream>

using namespace std;

int main()
{
    //postfix
    //int x=1
    //int y=x++ , y=1;
    //int z=x , z=2

    //Example
    cout << "Pre increment" << endl;
    int x=1;
    cout << "x value is :" <<x<< endl;
    int y=++x;
    cout << "y value after ++x is :" <<y<< endl;
    cout << "x value after ++x is :" <<x<< endl;
    return 0;
}

 

When we execute the above program, it will be produced the following result

pre increment
x value is :1
y value after ++x is :2
x value after ++x is :2

 

 

Program 3 – post-decrement

#include <iostream>

using namespace std;

int main()
{
    //postfix
    //int x=2
    //int y=x-- , y=2;
    //int z=x , z=1

    //Example
    cout << "Post decrement" << endl;
    int x=2;
    cout << "x value is :" <<x<< endl;
    int y=x--;
    cout << "y value after x-- is :" <<y<< endl;
    cout << "x value after x-- is :" <<x<< endl;
    return 0;
}

 

When we execute the above program, it will be produced the following result

Post decrement
x value is :2
y value after x-- is :2

 

x value after x– is :1

 

Program 4- pre-decrement

#include <iostream>

using namespace std;

int main()
{
    //postfix
    //int x=2
    //int y=x-- , y=1;
    //int z=x , z=1

    //Example
    cout << "Pre decrement" << endl;
    int x=2;
    cout << "x value is :" <<x<< endl;
    int y=--x;
    cout << "y value after --x is :" <<y<< endl;
    cout << "x value after --xis :" <<x<< endl;
    return 0;
}

 

When we executed above program, it will be produced following result

pre decrement
x value is :2
y value after --x is :1
x value after --x is :1

 

 

C++ Logical Operators

In C++ programming, the logical operator performs based on boolean expression, return either true or false.

The following table list the logical operators in C language

[wp_table id=6943/]

Program 1

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int age=20;
    if(age>=6 && age<=18){
    cout << "you are a students" << endl;
    }
    else if(age<=6 && age>=18){
    cout << "you are not a students" << endl;
    }
    else{
    cout << "you are not a students" << endl;
    }
    getch();
    return 0;
}

 

When we execute the above program, it will be produced the following result

you are not a students

 

 

Program 2

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    cout << "logical operator!" << endl;
    //variable declaration
    int num1=35,num2=40;
    //logical AND
    if(num1>=35 && num2>=35){
      cout<<"Num 1 and Num 2, both are greater than or equal to 35"<< endl;
    }
    else{
            cout<<"Num 1 or Num 2, both are less than than or equal to 35"<< endl;

    }

    if(num1>=35 || num2<=35){
      cout<<"Num 1 and Num 2, any one of them greater than or equal to 35"<< endl;
    }
    else{
            cout<<"Num 1 and Num 2, both are less than than or equal to 35"<< endl;

    }
getch();

    return 0;
}

 

When we execute the above program, it will be produced the following result

logical operator

Num 1 and Num 2, both are greater than or equal to 35

Num 1 and Num 2, any one of them greater than or equal to 35

 

C++ Bitwise Operators

In C++ language. the bitwise operator is an operator used to performs bit or binary pattern operation(bitwise operation).

The following table list the bitwise operators in C language

[wp_table id=6945/]
Binary form for Bitwise operator
[wp_table id=6948/]

C++ Other Operators

[wp_table id=6951/]

Operator precedence

The following table list out the precedence of C operators. The operators are listed top to bottom, in descending order precedence.
Operators are in the top of the list, that gets higher precedence. Operators are in the bottom of the list, that gets lower precedence

The following table list the operator precedence

[wp_table id=6956/]

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