File management c++ https://t.me/PROGRAMINGLANGUAGES1

Error handling during file operations in C/C++

✅It is quite common that errors may occur while reading data from a file in C++ or writing data to a file.

Below are some Error handling functions during file operations in C/C++:
ferror():
❤️The ferror() function checks for any error in the stream. It returns a value zero if no error has occurred and a non-zero value if there is an error.

»sample code: https://t.me/learntocodecpp/454

clearerr():

🖤The function clearerr() is used to clear the end-of-file and error indicators for the stream.

»sample code: https://t.me/learntocodecpp/457

The function perror()
🤍stands for print error. In case of an error, the programmer can determine the type of error that has occurred using the perror() function.
»sample : https://t.me/learntocodecpp/458

project one:<source AAU>

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Object oriented programming>OOP👌👍🏿

LESSON 3

ASSIGNMENT
✅> Every variables is assigned data type that designates the type and quantity of value it can hold.
✳️<> as many of you guess , variable is a name given to a memory location.

⚜️During declaration of a variable, we nedd to take care of two things
1. Dataype
2. Dataname

Similarly , we can initialize variables by assigning values in two ways:
1.variable initialization//
2. Assigning value by taking input from user//

/look the snippet code below with different dataypes and initializations

public class Firsta {

  public static void main(String[] args) {
    long x = 2345267;
    float y =3.45f;
    boolean z = true;
    char ch = '@';
    String str ="learn to code!!";
        
    
        
    
    System.out.println("the number is: " +x);
    System.out.println(y);
      System.out.println(z);
      System.out.println(ch);
      System.out.println(str);

Exam sample, AAU[ Java] , share ⚜️it please

LESSON 4:
IMPORTING SCANNER CLASS IN | JAVA
👨🏽‍💻Scanner is a class in java.util package used for obtaining the input of the primitive types like int, double, etc. and strings.

✳️To read numerical values of a certain data type XYZ, the function to use is nextXYZ().
✅ To read strings, we use nextLine().

🔱To read a single character, we use next().charAt(0). next() function returns the next token/word in the input as a string and charAt(0) function returns the first character in that string.



import java.util.Scanner;

public class Firsta {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);
System.out.println("enter some String");

String name = scanner.nextLine();


System.out.println("enter your age");
int x = scanner.nextInt();
scanner.nextLine();
System.out.println("what is you departent? ");
String dep =scanner.nextLine();



System.out.println("your name is: "+name);

System.out.println("your age is:"+ x);

System.out.println("your in "+dep+" departement now!");



}

}

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LESSON 5:
JAVA MATH:

⚜️The Java Math class has many methods that allows you to perform mathematical tasks on numbers.
✳️The Math.sqrt(x) method returns the square root of x.

✳️The Math.max(x,y) method can be used to find the highest value of x and y.

✳️ The Math.abs(x) method returns the absolute (positive) value of x.

❤️ Math.random() returns a random number between 0.0 (inclusive), and 1.0 (exclusive).

public class Firsta {

  public static void main(String[] args) {
    double x,y,z;
    
      /*double x = 3.14;
      double y = 3.41;
      
      double z = Math.max(x, y);
      double a = Math.sqrt(5);
      double ab = Math.ceil(x);// maximum number
      double ac = Math.floor(y);// minimum number
      System.out.println(z);*/
     System.out.println(a);
      System.out.println(ab);

‼️THERE ARE ALOT OF METHODS IN JAVA FOR FURTHER MATHEMATICAL OPERATIONS
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