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C++ Articles
Page 482 of 597
C++ equivalent of instanceof
C++ has no direct method to check one object is an instance of some class type or not. In Java, we can get this kind of facility.In C++11, we can find one item called is_base_of. This will check if the given class is a base of the given object or not. But, this does not verify whether the given class instance uses that function. The nearest possible functionality similar to "instanceof" can be achieved using dynamic_cast (expression). This tries to covert the given value into the specified type and returns the result. if the cast is unsuccessful this returns a null ...
Read MoreFind the smallest after deleting given elements using C++
In this problem, we are given two arrays arr[] and del[]. Our task is to find the smallest after deleting given elements.We will be deleting values from the array arr[] that are present in del[]. And then print the smallest value after deletion.Let’s take an example to understand the problem, Input arr[] = {2, 5, 6, 9, 1} del[] = {1, 5, 9}Output 2Solution ApproachA simple solution to the problem is using hashing. We will insert all the values of del[] array in the hash table. Then we will traverse the array arr[] and check if the values in the ...
Read MoreFind the slope of the given number using C++
In this problem, we are given a number N. Our task is to find the slope of the given number.Slope of a number is the total number of maxima and minima digits in the number.Maxima digit is the digit whose both neighbours (previous and next) are smaller.Maxima digit is the digit whose both neighbours (previous and next) are greater.Let’s take an example to understand the problem, Input N = 9594459Output 2Solution ApproachA simple solution to the problem is by traversing the number digit by digit from excluding the first and last one (the don’t count form maxima or minima). Now, ...
Read MoreMaximum occurred integer in n ranges using C++
In this problem, we are given N ranges. Our task is to maximum occurred integer in n ranges.For the starting and ending value of all ranges. We need to find the value which occurs the most.Let’s take an example to understand the problem, Input S1 = 1, E1 = 3 S2 = 2, E2 = 6 S3 = 3, E3 = 4Output 2Solution ApproachA simple approach t o solve the problem is by using hashing, we will use a hash table to count all members and their count. We will traverse all ranges and store count in the hash table, ...
Read MoreFind the Nth term of the series 14, 28, 20, 40,..... using C++
In this problem, we are given an integer value N.Our task is to find the nth term of the series −14, 28, 20, 40, 32, 64, 56, 112….Let’s take an example to understand the problem, InputN = 6Output64Solution ApproachTo find the Nth term of the series we need to find the general term of the series. For which we need to observe the series closely. I can see two different ways to solve the series.Method 1The series is a mixture of two different series at even and odd positions.At odd positions − 14, 20, 32, 56, ….T1 = 14 T3 ...
Read MoreC++ program to find Nth Non Fibonacci Number
In this problem, we are given an integer value N. Our task is to use a C + + program to find the Nth Non Fibonacci Number.Fibonacci Series generates subsequent number by adding two previous numbers. The Fibonacci series starts from two numbers − F0 & F1. The initial values of F0 & F1 can be taken 0, 1 or 1, 1 respectively.Let’s take an example to understand the problem, Input N = 5Output 10Solution ApproachA simple solution to the problem is to find the Fibonacci numbers and then print the first n numbers which are not present in the ...
Read MoreFind the row with maximum number of 1s using C++
In this problem, we are given a binary matrix where elements of each row are sorted. Our task is to find the row with maximum number of 1s.Let’s take an example to understand the problem, Inputmat[][] = {{ 0 1 1 1} {1 1 1 1} {0 0 0 1} {0 0 1 1}}Output1ExplanationThe count of 1’s in each row of the matrix : Row 0 : 3 Row 1 : 4 Row 2 : 1 Row 3 : 2Solution ApproachA simple solution to the problem is by finding the row with the smallest index of the ...
Read MoreFind the repeating and the missing number using two equations in C++
In this problem, we are given an array arr[] of size N. It consists of integer values ranging from 1 to N. And one element x from the range is missing whereas one element y in the array occurs double. Our task is to find the repeating and the missing number using two equations.Let’s take an example to understand the problem, Inputarr[] = {1, 2 , 3, 3}Outputmissing = 4, double = 3Solution ApproachA method to solve the problem is using two equations for the two values x and y. Then solve the equation to get the value for x ...
Read MoreFind the position of the last removed element from the array using C++
In this problem, we are given an array arr[] of size N and an integer value M. Our task is to find the position of the last removed element from the array.The removal of values from the array is based on the operations −For an element in the array arr[i]. If arr[i] > M, pop the value and push arr[i] - M to the end of the array. Otherwise remove it from the array.Perform the operations till the array consists of elements.Let’s take an example to understand the problem, Inputarr[] = {5, 4, 8}, M = 3Output3ExplanationRemoving values using operations, ...
Read MoreFind the overlapping sum of two arrays using C++
In this problem, we are given two arrays arr1[] and arr2[] consisting of unique values. Our task is to find the overlapping sum of two arrays.All elements of the arrays are distinct. And we need to return the sum of elements which are common for both arraysLet’s take an example to understand the problem, Inputarr1[] = {5, 4, 9, 2}, arr2[] = {6, 3, 9, 4}Output2ExplanationThe elements that are present in both arrays are 9 and 4. The sum is 9 + 9 + 4 + 4 = 26Solution ApproachA simple solution to the problem is traversing one array say ...
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