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Articles on Trending Technologies
Technical articles with clear explanations and examples
C++ Program to Subtract Complex Number using Operator Overloading
Operator overloading can be done with most of the built-in operators in C++. The overloaded operators are functions with the keyword operator followed by the operator symbol that is defined. The overloaded operators have a return type and a parameter list like any function.A program that subtracts complex numbers using operator overloading is as follows −Example#include using namespace std; class ComplexNum { private: int real, imag; public: ComplexNum(int r = 0, int i =0) { real = r; imag = i; } ComplexNum operator - (ComplexNum const &obj1) ...
Read MoreFibonacci of large number in java
Fibonacci numbers of Fibonacci series grows exponentially and can be very large for large numbers like 500 or 1000. To handle such number, long data type is not sufficient. BigInteger can handle large number easily. BigInteger is useful in scenarios where calculations results in data which is out of limit for available primitive data types. See the example below of getting Fibonacci number of 100 and 1000.Exampleimport java.math.BigInteger; public class Tester { public static void main(String args[]) { System.out.println("Fibonacci of 100: "); System.out.println(fibonacci(100)); System.out.println("Fibonacci of 1000: "); ...
Read MoreChecking for a Leap Year using GregorianCalendar in Java
The GregorianCalendar.isLeapYear() method determines if the given year is a leap year. Returns true if the given year is a leap year.Firstly, import the following package to work with GregorianCalendar class.import java.util.GregorianCalendar;Now, check for a year by adding it as a parameter in the isLeapYear() method.gcal.isLeapYear(2012)The following is an example.Exampleimport java.text.ParseException; import java.util.GregorianCalendar; public class Demo { public static void main(String[] args) throws ParseException { GregorianCalendar gcal = new GregorianCalendar(); System.out.println("Is it a leap year? "+gcal.isLeapYear(2012)); } }OutputIs it a leap year? trueLet us see another example.Exampleimport java.text.ParseException; import java.util.GregorianCalendar; public class ...
Read MoreC++ Program to Find ASCII Value of a Character
There are 128 characters in the ASCII (American Standard Code for Information Interchange) table with values ranging from 0 to 127.Some of the ASCII values of different characters are as follows −CharacterASCII ValueA65a97Z90z122$36&38?63A program that finds the ASCII value of a character is given as follows −Example#include using namespace std; void printASCII(char c) { int i = c; cout
Read MoreFind frequency of each word in a string in Java
In order to get frequency of each in a string in Java we will take help of hash map collection of Java.First convert string to a character array so that it become easy to access each character of string.Now compare for each character that whether it is present in hash map or not in case it is not present than simply add it to hash map as key and assign one as its value.And if character is present than find its value which is count of occurrence of this character in the string (initial we put as 1 when it ...
Read MoreReplace '*' with '^' with Java Regular Expressions
To replace *' with '^' using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace '*' with '^' using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("H*e*l*l*o"); System.out.println( "Initial String : "+ str); // replacing '*' with ...
Read MoreC++ Program to Multiply two Numbers
Multiplication of two numbers a and b yields their product. Value of a is added as many times as the value of b to get the product of a and b.For example.5 * 4 = 20 7 * 8 = 56 9 * 9 = 81Program to Multiply two Numbers using * OperatorA program to multiply two numbers using the * operator is given as follows −Example#include using namespace std; int main() { int a = 6, b = 8; cout
Read MoreReplace one string with another string with Java Regular Expressions
To replace one string with another string using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace one string with another string using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("Good Harry Good"); System.out.println( "Initial String : "+ str); ...
Read MoreC++ Program to Check Whether a Number is Palindrome or Not
A palindrome number remains the same if its digits are reversed i.e its value does not change. A palindrome number can also be called symmetric. For example: The numbers 12321, 1551, 11 etc are palindromes as they do not change even if their digits are reversed.A program that checks if a number is palindrome or not is as follows.Example#include using namespace std; void palindrome(int num) { int rev=0,val; val = num; while(num > 0) { rev = rev * 10 + num % 10; num = num / 10; } if(val==rev) cout
Read MoreCheck two numbers for equality in Java
To check two numbers for equality in Java, we can use the Equals() method as well as the == operator.Firstly, let us set Integers.Integer val1 = new Integer(5); Integer val2 = new Integer(5);Now, to check whether they are equal or not, let us use the == operator.(val1 == val2)Let us now see the complete example.Examplepublic class Demo { public static void main( String args[] ) { Integer val1 = new Integer(5); Integer val2 = new Integer(5); Integer val3 = new Integer(10); System.out.println("Integer 1 = "+val1); ...
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