Some Simple example program in C++ language
In this tutorial, we will discuss the Some simple example program in C++ language
C++ is one of the object-oriented program similar java
C++ programming language defines several Header files similar C. That contains much useful information run your program, generally, we can use <iostream> header file
Using namespace std; instruct the compiler to use the std namespace
main ()– main() is the main function and program execution begins. That is a beginning point in C++
cout<< – This is to use to display the output on the screen
return 0 – this is to help to terminate the main function and then return the value 0
C++ first program
Here, Some C++ programs and their outputs
First Program
Helloworld program
When the above code is compiled and executed, it produces the following result:
C++ second program
Variable assignment and display default value
#include <iostream>
using namespace std;
int main()
{
int age;
float average;
char sex;
bool isit;
cout << age << endl << average << endl << sex << endl << isit << endl;
return 0;
}
When the above code is compiled and executed, it produces the following result:
out put some garbage values
C++ third program
variable assignment and display given value
#include <iostream>
using namespace std;
int main()
{
int age=23;
float average=22.52;
char sex='m';
bool isit=true;
cout << age << endl << average << endl << sex << endl<< isit<< endl;
return 0;
}
When the above code is compiled and executed, it produces the following result:
output the assigned value.
C++ forth program
Display the value using cout in C++ language
using the cout
#include <iostream>
using namespace std;
int main()
{
cout << "Hello this is using cout in C++" << endl;
return 0;
}
bio data using cout
#include <iostream>
using namespace std;
int main()
{
int age=35;
int dob=19770805;
int icno=772182503;
cout <<"Hello my name is jhon"<<endl<<"my age is "<<age<< endl
<<"my dob is "<<dob<< endl
<<"my ic no is "<<icno<< endl<< "ya this is my biodata"<<endl;
return 0;
}
When the above code is compiled and executed, it produces the following result:
C++ fifth program
Takes input from thr user
using cin
#include <iostream>
using namespace std;
int main()
{
int age;
int marks;
float avg;
cout << "enter your age and average and marks "<< endl;
cin >> age >> avg >> marks;
cout << "you have entered age is "<< endl << age<< endl << "average is "
<< endl << avg << endl <<"marks is " << endl<< marks << endl;
return 0;
}
When the above code is compiled and executed, it produces the following result:
C++ sixth program
Arithmetic operation in C++
#include <iostream>
using namespace std;
int main()
{
int num1=10 , num2=20;
cout << num1 <<"+"<<num2<<"="<<num1+num2<< endl;
cout << num1 <<"-"<<num2<<"="<<num1-num2<< endl;
cout << num1 <<"*"<<num2<<"="<<num1*num2<< endl;
cout << num1 <<"/"<<num2<<"="<<num1/num2<< endl;
return 0;
}
When the above code is compiled and executed, it produces the following result:
C++ seventh program
increment and decrement operators
prefix – ++a or –a
postfix – a++ or a–
#include <iostream>
using namespace std;
int main()
{
int a=10;
a++;
cout << a<<endl;
a--;
cout << a <<endl;;
return 0;
}
When the above code is compiled and executed, it produces the following result:
Using assignment operator
#include <iostream>
using namespace std;
int main()
{
int a;
int b=3;
a=b;
a+=2;
cout << a;
return 0;
}
When the above code is compiled and executed, it produces the following result:
