We will understand how C and C++ behave differently in case we re-declare a global variable without initializing, redeclaring global variables with initialization, redeclaring global variables and initializing them twice. Also, we will repeat above combinations with local variables.1. A) C program : Redeclaring Global variables with no initialization#include int var; int var; int main(){    printf("Var = %d",var);    return 0; }OutputVar = 0B) C++ program : Redeclaring Global variables with no initialization#include using namespace std; int var; int var; int main(){    cout

Bubble Sort is one of the simplest sorting algorithms used to sort data by comparing the adjacent elements. All the elements are compared in phases. The first phase places the largest value at the end, the second phase places the second largest element at the second last position and so on till the complete list is sorted.Bubble Sort Algorithmint arr[5]= { 5, 4, 2, 1, 3 };int i, j ;Traverse from index i=0 to iarr[j] swap arr[i] with arr[j]EndRecursive Bubble SortIf array length is 1 then returnTraverse array once and fix largest element at the endRecursively perform step 2 for ... Read More

Suppose we are in charge of building a library system that monitors and queries various operations at the library. We are now asked to implement three different commands that perform the following −By using command 1, we can record the insertion of a book with y pages at shelf x.By using command 2, we can print the page number of the y-th book at shelf x.By using command 3, we can print the number of books on shelf x.The commands are given to us as a 2D array in this format {command type, x, y}. If there is no y ... Read More

Suppose we are given two integers k and n. Our task is to perform three operations; bitwise AND, bitwise OR, and bitwise XOR between all pairs of numbers up to range n. We return the maximum value of all three operations between any two pairs of numbers that is less than the given value k.So, if the input is like n = 5, k = 5, then the output will be 4 3 4.The greatest value of AND, OR, and XOR operations between all pairs of numbers that are less than 5 are 4, 3, and 4 respectively. We can ... Read More

Suppose we have an array of different triangles where triangles[i] = [ai, bi, ci] these are the sides of ith triangle. We shall have to sort the triangles based on their area. The area of a triangle by using sides is: square root of p*(p-a)*(p-b)*(p-c) where p = (a+b+c)/2.So, if the input is like (7, 24, 25), (5, 12, 13), (3, 4, 5), then the output will be (3, 4, 5), (5, 12, 13), (7, 24, 25)To solve this, we will follow these steps −Define triangle object with sides a, b and cDefine a function square(), this will take Triangle ... Read More

Suppose we want to make some functions that can take multiple arguments, there are no fixed number of arguments. We want to make three functions sum(), max() and min(), they can calculate sum of the numbers, maximum of numbers and minimum of given numbers respectively. Each of these functions will take number of arguments count as their first argument. To define this type of functions we need to use ellipsis (...) three dots into the function argument. To use it we shall have to include stdarg.h header file. This type of function is called variadict functions. To access variable arguments ... Read More

Suppose we have few strings in an array. We shall have to find all permutations of them in different line.So, if the input is like strings = ["abc", "def", "ghi"], then the output will beabc def ghi abc ghi def def abc ghi def ghi abc ghi abc def ghi def abcTo solve this, we will follow these steps −Define a function next_permutation(), this will take n, string array s, for initialize i := n - 1, when i > 0, update (decrease i by 1), do:if s[i] > s[i - 1]), then:j := i + 1for j < n, ... Read More

Suppose we have a string s. The s contains letters and digits both. We shall have to find frequencies of each digit and display them. To do this we can make an array of size 10 for each digits (0 through 9), initially all elements are 0 inside the array, then when we encounter a digit simply increase the value of that index and finally print them all.So, if the input is like s = "we85abc586wow236h69", then the output will be (Number 2, Freq 1) (Number 3, Freq 1) (Number 5, Freq 2) (Number 6, Freq 3) (Number 8, Freq ... Read More

Suppose we have a string s that contains a sentence with few words. We shall have to print each word into new lines. To do this we can use the strtok() function under the string.h header file. This function takes the string and a delimiter. Here the delimiter is blank space " ".So, if the input is like s = "Let us see some string tokenizing fun", then the output will beLet us see some string tokenizing funTo solve this, we will follow these steps −token := first word by using strtok(s, " ") here delimiter is " "while token ... Read More

Suppose we have an array with n elements. We shall have to reverse the elements present in the array and display them. (Do not print them in reverse order, reverse elements in place).So, if the input is like n = 6 arr = [9, 8, 7, 2, 4, 3], then the output will be [3, 4, 2, 7, 8, 9]To solve this, we will follow these steps −for initialize i := 0, when i < quotient of n/2, update (increase i by 1), do:temp := arr[i]arr[i] := arr[n - i - 1]arr[n - i - 1] := tempfor initialize i ... Read More