Programming Articles - Page 2059 of 3363

In this tutorial, we will be discussing a program to count the number of 1’s and 0’s in a binary array using STL in C++.For this we will be provided with an array. Our task is to count the number of 0’s and 1’s present in the array.Example Live Demo#include using namespace std; // checking if element is 1 or not bool isOne(int i){    if (i == 1)       return true;    else       return false; } int main(){    int a[] = { 1, 0, 0, 1, 0, 0, 1 };    int n = sizeof(a) / sizeof(a[0]);    int count_of_one = count_if(a, a + n, isOne);    cout

In this tutorial, we will be discussing a program to count smaller elements on right side using set in C++ STL.For this we will be provided with an array. Our task is to construct a new array and add the number of smaller elements on the right side of the current element at its position.Example Live Demo#include using namespace std; void count_Rsmall(int A[], int len){    set s;    int countSmaller[len];    for (int i = len - 1; i >= 0; i--) {       s.insert(A[i]);       auto it = s.lower_bound(A[i]);       countSmaller[i] = ... Read More

In this tutorial, we will be discussing a program to count smaller elements in sorted array in C++.In this we will be given a number and our task is to count all the elements present in the sorted array which are smaller than the given number.Example Live Demo#include using namespace std; int countSmaller(int arr[], int n, int x){    return upper_bound(arr, arr+n, x) - arr; } int main(){    int arr[] = { 10, 20, 30, 40, 50 };    int n = sizeof(arr)/sizeof(arr[0]);    cout

In this tutorial, we will be discussing a program to understand core dump (segmentation fault) in C/C++.It happens due to reasons like when code tries to write on read only memory or tries to access corrupt memory location.ExampleModifying a string literalint main(){    char *str;    str = "GfG";    *(str+1) = 'n';    return 0; }Accessing out of array index bounds#include using namespace std; int main(){    int arr[2];    arr[3] = 10;    return 0; }Accessing an address which is freed#include #include int main(void){    int* p = malloc(8);    *p = 100;    free(p);    *p = 110;    return 0; }OutputAbnormal termination of program

In this tutorial, we will be discussing a program to understand how to convert strings into numbers in C/C++.C/C++ provides two ways to convert strings into numbers.Example Live DemoUsing sscanf()#include int main(){    const char *str = "12345";    int x;    sscanf(str, "%d", &x);    printf("The value of x : %d", x);    return 0; }OutputThe value of x : 12345Using stoi() Live Demo#include #include using namespace std; int main(){    string str1 = "45";    string str2 = "3.14159";    string str3 = "31337 geek";    int myint1 = stoi(str1);    int myint2 = stoi(str2);    int myint3 = stoi(str3);    cout

In this tutorial, we will be discussing a program to understand how to convert a string into integer array in C/C++.For this we will create a new array. Traverse through the given string, if the character is a comma “, ”, we move on to the next character else add it to the new array.Example Live Demo#include using namespace std; //converting string to integer array void convert_array(string str){    int str_length = str.length();    int arr[str_length] = { 0 };    int j = 0, i, sum = 0;    //traversing the string    for (i = 0; str[i] != ... Read More

In this tutorial, we will be discussing a program to understand conversion of whole string to uppercase or lowercase using STL in C++.To perform this transformation, C++ STL provides toupper() and tolower() functions to convert to uppercase and lowercase respectively.Example Live Demo#include using namespace std; int main(){    string su = "Tutorials point";    transform(su.begin(), su.end(), su.begin(), ::toupper);    cout

In this article, we will learn to implement a lambda expression in JShell in Java 9. We will learn the syntax, explain the working of lambda expressions, and how they work with functional interfaces, and give examples with the JShell environment. JShell JShell is Java's first REPL and command-line tool that provides interactive use of Java programming language elements. We can test the functionality in isolation of a class by using this tool. JShell creates a simple and easy programming environment in the command-line that takes input from the user, reads it, and prints the result. What is a ... Read More

Variable Handle is a variable or reference to a set of variables, including other components of a static field, non-static fields, and outer array elements in the heap data structure. It means that Variable Handle is similar to the existing Method Handle. It can be represented by using java.lang.invoke.VarHandle class. We can use java.lang.invoke.MethodHandles.Lookup static factory method to create Variable Handle objects. It can also be used to access a single element in the array, and byte[] array.Syntaxpublic abstract class VarHandle extends ObjectExampleimport java.lang.invoke.MethodHandles; import java.lang.invoke.VarHandle; import java.util.Arrays; public class VarHandleTest {    public static void main(String args[]) {       VarHandle varHandle = MethodHandles.arrayElementVarHandle(int[].class); ... Read More

ProcessHandle interface introduced in Java 9. It allows us to perform actions and check the state of a process that relates. This interface provides the process’s native process ID (pid), start time, accumulated CPU time, arguments, command, user, parent process, and descendants.ProcessHandle interface allows us to perform the following actions.It returns a ProcessHandle.Info containing further information about a processThe Pid of a processIf it is aliveRetrieve a snapshot of the direct children of a processRetrieve a snapshot of all descents of a processRetrieve a snapshot of all currently running processesAllow the process to be destroyedIt returns a CompletableFuture with a ProcessHandle for when the ... Read More