C++ How To's

C++ How To's

These examples show how to solve common tasks in C++.

Numbers

• Add Two Numbers - Add two numbers and print the result.
• Swap Two Variables - Exchange the values of two variables.
• Even or Odd Number - Check if a number is even or odd.
• Reverse a Number - Reverse the digits of a number.
• Positive or Negative - Check if a number is positive, negative or zero.
• Square Root - Find the square root of a number.
• Area of Rectangle - Calculate the area of a rectangle.
• Celsius to Fahrenheit - Convert a temperature from Celsius to Fahrenheit.
• Sum of Digits - Add up the digits of a number.
• Armstrong Number - Check if a number is an Armstrong number.
• Random Number - Generate a random number.

Strings

• Count Words - Count how many words are in a sentence.
• Count Vowels in a String - Count how many vowels are in a string.
• Remove Vowels - Remove the vowels from a string.
• Count Digits in a String - Count the digits in a string.
• Reverse a String - Reverse the characters in a string.
• Palindrome Check - Check if a string is the same forward and backward.
• Check Anagram - Check if two strings have the same characters in a different order.
• Split a String - Split a string into words, or at a separator like a comma.
• Remove Whitespace - Remove spaces, tabs and newlines from a string.
• Count Character Frequency - Count how many times each character appears in a string.

Arrays

• Sum of Array Elements - Add all the elements in an array.
• Find Array Average - Calculate the average value of array elements.
• Sort an Array - Sort the elements of an array.
• Find Smallest Element - Find the lowest value in an array.
• Find Largest Element - Find the largest value in an array.
• Second Largest Array - Find the second largest value in an array.
• Min and Max in Array - Find the minimum and maximum value in an array.
• Merge Two Arrays - Combine two arrays into one.
• Remove Duplicates - Remove duplicate values from an array by using a set.
• Find Duplicates - Find the elements that appear more than once in an array.
• Shuffle an Array - Put the elements of an array in a random order.

Algorithms

• Factorial of a Number - Calculate the factorial of a number.
• Fibonacci Sequence - Print the first numbers of the Fibonacci sequence.
• Find GCD - Find the greatest common divisor of two numbers.
• Check Prime Number - Check if a number is a prime number.

Loops

• Loop Through a Vector - Loop through all the elements of a vector.
• Loop Through a Map - Loop through all the keys and values of a map.