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C++ Articles
Page 317 of 597
How do I clear the cin buffer in C++?
Before knowing the solution to clearing the cin buffer in C++, let us first see what the buffer is in C++. What is The Buffer in C++ A buffer is a temporary storage area that holds data while standard I/O devices are in use. In C++, a stream also work as a buffer. When a key is pressed, the input is not immediately sent to the program; instead, it is stored in a buffer. The operating system keeps this data in the buffer until the program is allocated time to process it. Why We Clear The cin Buffer in C++ ...
Read MorePrecision of floating point numbers in C++ (floor(), ceil(), trunc(), round() and setprecision())
Precision of floating point numbers is the accuracy upto which a floating point number can hold the values after decimal. For example, 10/6 = 1.6666666… these have recurring decimals which can take infinite memory spaces to be stored. To avoid memory overflow in such cases the compiler set a precision limit to the number. For float values in C++, the precision is set to 6-7 digit after that if the decimal recurs it will discard the value. So, to avoid any major losses when this discarding takes place there are methods and libraries that support the precision is float values. ...
Read MoreC++ program to search an element in a sorted rotated array
A sorted and rotated array is an array that is sorted in ascending order and then rotated either left or right by a specific number of elements. There should exist exactly one pivot point around which the array is rotated. The array can be said to be split into two halves and each half is a sorted array. For example: {5, 6, 7, 1, 2, 3} is a sorted and rotated array and {5, 6, 7, 8, 2, 5, 4, 5} is not a sorted and rotated array. In this article, we have an array of integers. Our task is ...
Read MoreCheck if an array is sorted and rotated in C++
A sorted and rotated array is an array that is sorted in ascending or descending order and then rotated either left or right by a specific number of elements. There should exist exactly one pivot point around which the array is rotated. The array can be said to be split into two halves and each half is a sorted array. For example: {5, 6, 7, 1, 2, 3} is a sorted and rotated array and {5, 6, 7, 8, 2, 5, 4, 5} is not a sorted and rotated array. In this article, our task is to check if the ...
Read MoreWhat do single quotes do in C++ when used on multiple characters?
Single quotes in C++ are used to denote characters, not strings. When you use single quotes around multiple characters or strings, C++ compiler will treat it as a multi-character literal, which will be stored as an integer value, representing the combined ASCII values of those characters. In this article, we will learn all about single quotes in C++ and how they behave when used with multiple characters. Single Quotes in C++ In C++, single quotes are used to represent a single character. For example, 'a' is a character literal representing the english alphabet 'a'. For each character, C++ assigns a ...
Read MoreWhy does std::getline() skip input after a formatted extraction?
When using std::getline after a formatted extraction (like std::cin >>), you might see an unexpected behavior, where std::getline is skipping the next input line. In this article, we will understand why this happens and how to handle it. Getline skipping input after formatted extraction The code below shows how getline() is skipping input after a formatted extraction: #include #include using namespace std; int main() { string name; string city; cin
Read MoreHow to convert an enum type variable to a string in C++?
Enum is a user-defined datatype in C++ that is used to assign names to integer values. For example, you can use an enum to represent the days of the week from 0 to 6, where 0 represents Sunday, 1 represents Monday, and so on. When you try to access a value of an enum, it will only return an integer value. In this article, we will learn how to convert an enum type variable to a string type variable in C++, so that we can easily display the enum value as a string. Example of Enum: enum color ...
Read Morelldiv() function in C++ STL
The lldiv() function is used to perform division operation on long long integers and return both quotient and remainder. In this article, we will learn how to use the lldiv() function from the Standard Template Library (STL) in C++. What is lldiv()? The lldiv() is a in-built function in C++ that is used to divide one long long integer by another and return the result as a structure that contains both the quotient and remainder. This function is useful when both values are needed after a division operation. The return type of this function is a structure called lldiv_t, ...
Read MoreStringize and Token-pasting operator in C
In this article we will see what are the Stringize operator and Token Pasting operator in C. The stringize operator (#) and the token pasting operator (##) are preprocessor operators used within macros for text manipulation. It sends commands to compiler to convert a token into string. Stringize Operator (#) The stringize operator (#) is a preprocessor operator that converts the micros parameter into a string literal. The preprocessor encloses the actual argument passed to the macro in double quotes, effectively convert it into a string. Syntax Following is the syntax of Stringize Operator: #define MACRO_NAME(arg) #arg ExampleIn ...
Read MoreStringStream in C++ for Decimal to Hexadecimal and back
In this article, we will see how to convert a Decimal to a Hexadecimal string and versa in C++. For this conversion, we are using the string stream feature of C++. You can use StringStreams for formatting, parsing, converting a string into numeric values, and more. The Hex is an I/O manipulator. It takes a reference to an I/O stream as a parameter and returns a reference to the string after manipulating it. Implementation of converting Decimal to Hexadecimal In the following example, we will see how to convert decimal numbers or hexadecimal numbers in C++. #include #include ...
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