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Articles by sudhir sharma
Page 69 of 98
Sum of squares of binomial coefficients in C++
The binomial coefficient is a quotation found in a binary theorem which can be arranged in a form of pascal triangle it is a combination of numbers which is equal to nCr where r is selected from a set of n items which shows the following formulanCr=n! / r!(n-r)! or nCr=n(n-1)(n-2).....(n-r+1) / r!The sum of the square of Binomial Coefficient i.e (nC0)2 + (nC1)2 + (nC2)2 + (nC3)2 + ……… + (nCn-2)2 + (nCn-1)2 + (nCn)2Input :n=5 Output:252ExplanationIn this program first we have to find the binomial coefficient of r which is selected from n set then we have to ...
Read MoreThe basic_string c_str function in C++ STL?
The basic_string c_str function that returns a pointer to an array of characters that is terminated using null character. It is an inbuilt method that has the value of a string that has null character termination.Syntax to define a c_str function in C++ −const Char ptr* c_str() constAbout the functionIt is an inbuilt method for the c++ STL library. No parameters can be passed to the method. It returns a char pointer. This pointer points to NULL terminated character array.Example#include #include using namespace std; int main() { string s = "I Love Tutorials Point"; int flag ...
Read MoreSum of squares of Fibonacci numbers in C++
Fibonacci series is a mathematical sequence of number which starts from 0 and the sum of two numbers is equal to the next upcoming number, for example, the first number is 0 and the second number is 1 sum of 0 and 1 will be 1F0=0, F1=1AndFn=Fn-1+Fn-2, F2=F0+F1 F2=0+1 F2=1then when we add number 1 and 1 then the next number will be 2F1=1, F2=1AndFn=Fn-1+Fn-2, F3=F1+F2 F3=1+1 F3=2Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, …We have to find the square of the fuel energy series and then we have to sum it and find ...
Read MoreAngular Sweep Algorithm in C++
The algorithm to find the maximum number of points that can be enclosed in a circle of a given radius. This means that for a circle of radius r and a given set of 2-D points, we need to find the maximum number of points that are enclosed (lying inside the circle not on its edges) by the circle.For, this is the most effective method is the angular sweep algorithm.AlgorithmThere are nC2 points given in the problem, we need to find the distance between each of these points.Take an arbitrary point and get the maximum number of points lying in ...
Read MoreNew ways to Assign values to Variables in C++ 17 ?
In C++ 17, there are introduced two new ways by which a programmer can assign values to a variable or declared them. In this update, elser then the classical way of assigning values to a variable the following two ways to initialise values.Classical methodInitially the assignment operator ‘=’ is used for assignment and declaration of a variable. assignment of a variable using = looks like, datatype variable_name = value;Example, int val = 243;New methodUniform initialisationIn uniform initialisation of variables we do not use the ‘=’ operator. the value is enclosed inside a pair of curly braces ' {} '. Value ...
Read MoreA matrix probability question in C?
The matrix probability question Calculates the probability that whether an element will be inside the given matrix after taking N steps and any direction. This means we need to find what is the probability of an element not going out of the scope of the matrix even after moving N positions in any direction.In this problem, we are free to move the matrix element in all four directions (left, right, up, down). And the probability of moving elements is same 0.25 or 1/4.The program will return 0 if the element steps out otherwise not.Example#include int isSafe(int x, int y, ...
Read MoreC++ bitset and its application ?
A bitset is a dataset that stores multiple boolean values but takes lesser memory space as compared to other data sets that can store a sequence of bits like a boolean array or boolean vector.Bitsets stores the binary bits in a form that takes less memory space, it stores them in compressed from. Accessing any element is same as others i.e. by using its index value i.e. bitset_name[index]. But the indexing of elements in a bitset is reverse. Let’s take an example, for bitset {01101001} the element at 0th index is 1 and so on. So 0’s are at index ...
Read MoreC++ Stream Classes Structure
In C++ stream refers to the stream of characters that are transferred between the program thread and i/o.Stream classes in C++ are used to input and output operations on files and io devices. These classes have specific features and to handle input and output of the program.The iostream.h library holds all the stream classes in the C++ programming language.Let's see the hierarchy and learn about them, Now, let’s learn about the classes of the iostream library.ios class − This class is the base class for all stream classes. The streams can be input or output streams. This class defines members that ...
Read More10 Essential Web Scraping Tools for Data Collection in 2025
Data is more than just a business asset – it's a strategic advantage. Whether you're monitoring competitors, tracking product prices, gathering SEO insights, or creating machine learning models, relevant and structured web data is the modern gold. That’s where web scraping can become your winning strategy. Web scraping is the extraction of digital data and information from websites. Most businesses use it for market research, lead generation, brand monitoring, and much more. But scraping the modern web is way different nowadays, with dynamic content, anti-bot systems, and ever-changing layouts making it more difficult by the day. Depending on your needs, ...
Read MoreHow to compare float and double in C++?
In C++, floating-point numbers are used to represent decimal values. The most commonly used floating-point types are float and double. These data types differ in their size, precision, and use cases. Understanding how to use and compare them correctly is important for accurate computations. Understanding Float and Double Precision The float is a 32-bit single-precision floating-point type that can store approximately 7 decimal digits, while double is a 64-bit double-precision type that offers about 15 to 16 digits of precision. Due to these differences, double is generally preferred for higher accuracy in scientific and financial calculations. Example: Printing ...
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