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Programming Articles
Page 1662 of 2547
C++ Program to Perform Partition of an Integer in All Possible Ways
In this article, we have a positive integer 'n'. Our task is to generate all possible unique ways to represent 'n' as the sum of positive integers in C++. Each partition should give a sum equal to the given 'n'. Here is an example: Input: n = 4 Output: 4 3 1 2 2 2 1 1 1 1 1 1 Steps to Perform Unique Partition of Integer We start with the current partition i.e. with an initial value of n. Then we print the current partition. ...
Read MoreClearing input buffer in C/C++
In C/C++, an input buffer is a temporary storage area where the program processes the input. Suppose, you are an user and you type some characters using a keyboard but those characters are not passed to the program directly because it involves several layers of handling such as keyboard firmware, OS input queues, and event processing. So, they first proceed with the collection of an input buffer. Next, when the program is ready, it reads from the buffer. How Input Buffer Affects a Program? The input buffer affected to the program when we are using the functions like scanf() or ...
Read MoreC++ Program to Find Fibonacci Numbers using Matrix Exponentiation
The Fibonacci numbers, commonly denoted as F(n) forms a sequence, called the Fibonacci sequence. In Fibonacci series, each number is the sum of the two previous two numbers, starting from 0 and 1. It is represented as F(n) = F(n-1) + F(n-2). The matrix exponentiation method is used to calculate the powers of matrix efficiently with better time complexity. In this article, we provide a value of n. This n is the value up to which we want to find the Fibonacci numbers using the matrix exponentiation method in C++. Here is an example of the Fibonacci series up to ...
Read MoreHow to compile & run a Java program using Command Prompt?
Command prompt is a command line interface that accepts text-based inputs or commands and performs tasks based on those command. Nowadays, there are various integrated development environments (IDEs) that are available to compile, build, and run Java programs within their environment. However, we can also compile and run Java programs using the Command Prompt. Compiling and Running Java Programs using CLI To compile and run Java programs outside the IDEs using the Command Prompt, we need to install the JDK and set its path in our system. To set up the development environment for Java on your local machine, we ...
Read MoreWhy do we get ClassNotFoundException when the class exists in Java?
Whenever we try to load a class, ClassNotFoundException occurs when the application tries to load a class at runtime using methods like Class.forName() or ClassLoader.loadClass(), but the JVM cannot locate the class in the classpath. The following are the reasons of ClassNotFoundException occurence and they are - Incorrect Class Name Incorrect Package Structure ...
Read MoreHow to change/increase the heap size of the Java Virtual Machine in Java?
A Java program can execute in the Java Virtual Machine (JVM) and uses the heap memory to manage the data. If our Java program requires more memory, there is a possibility that the Java Virtual Machine(JVM) will begin to throw OutOfMemoryError instances when attempting to instantiate an object in Java. How to change/increase the JVM Heap Size? In Java, it is possible to increase the heap size allocated by the JVM: -Xms: Set an initial Java heap size JVM automatically manages the heap memory but we can ...
Read MoreCan we change method signature in overriding in Java?
No, you cannot change the method signature while overriding. Changing the method signature becomes method overloading, not overriding. Now, let's understand why - Method Signature In Java, a method signature consists of - Method name: It is used to call the method. Parameter list: It includes the number, type, and order of parameters. Note: The method signature does not include return type, ...
Read MoreDifference between constants and final variables in Java?
In Java, both constants and final variables are used to define variables that cannot be changed after initialization. But they have some differences. In this article, we will learn how they are different. Final Variable A final variable in Java means you cannot reassign it after it has been initialized. Whether it is a local variable, instance variable, or static variable, once it's assigned, the value cannot be changed. If you try to do so, a compile-time error will be generated. public class FinalExample { public static void main(String args[]) { ...
Read MoreRemove Trailing Zeros from string in C++
Trailing zeros are the zero occuring at the end of a string. In this article, we will discuss different approaches to remove trailing zeros from a string. The below section explains the problem statement. The input of this problem is a non-empty string containing characters and numbers. Our task is to remove all the zero's appering after the last non-zero character in the string. For example: // Input string "012424000" // Output String "012424" Remove Trailing Zeros From String Here is the list of approaches to remove all the trailing zeros from a string ...
Read MoreRemove spaces from std::string in C++
In this article, we will learn all the different approaches to remove the whitespaces from a standard string in C/C++. First of all, let's understand our problem statement. The input of this problem is a non-empty string containing multiple characters and whitespaces between those characters. Our task is to print the string by ignoring all the whitespaces into the output console. For example: // Input String "This is a string" // Output String "Thisisastring" Remove Whitespaces from a String in C++ Here is the list of approaches to remove all the whitespaces from a string using ...
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