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:
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
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
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
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
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
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
The following table list the unary operators in C language
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
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
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
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
The following table list the operator precedence
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