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An array can be created using all data types such as int, char, float, double etc. But creating an array by using the void data type is not possible. An error will be displayed if that is done.A program that demonstrates this is given as follows.Example Live Demo#include #include int main() { void arr1[4]; printf("A void array"); return 0; }OutputThe above program returns the following error.error: declaration of ‘arr1’ as array of voids void arr1[4];Now let us understand the above program.An array arr1 of void data type is created in the above program. Since this is ... Read More
This example demonstrate about how to using string writer append in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml In the above code, we have taken editext, button and textview. When user click on button after inserting value in edittext, it will append the data using string writer.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.view.View; ... Read More
This example demonstrate about How to use Synchronized list in android listview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. In the above code, we have taken editext, button and listview. When user click on button after inserting value in edittext, it will do data validation with listview items.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import ... Read More
This example demonstrate about How to use a nested array in android listview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml In the code, we have taken listview to show array values.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; public class MainActivity extends AppCompatActivity { ListView list; ... Read More
This example demonstrate about How to sort string array in android listview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml In the code, we have taken listview to show a sorted arrayStep 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import java.util.Arrays; public class MainActivity extends AppCompatActivity { ListView list; String[] array = {"2", "5", ... Read More
This example demonstrate about How to reverse of integer array in android listview.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml In the code, we have taken listview to show reversed arrayStep 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; public class MainActivity extends AppCompatActivity { ListView list; int[] ... Read More
Drones are a next-generation technology with far-reaching implications for several industries with a large logistics footprint. As with many other innovations and inventions, drones were also developed by the military specifically for surveillance in sensitive areas. Let's consider the impact of drones on the operations of the security forces especially in a vast country like India with all the challenges that it faces from multiple sources of discord.If we take the LOC (Line of Control) which divides the state of Jammu & Kashmir from those parts of the state that are under the illegal occupation of Pakistan, we find that ... Read More
This example demonstrate about How to print number of words in textview in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken textview to show paragraph and toast will show the information about number of words.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { TextView ... Read More
Static variables can be defined using the static keyword. They are variables that remain in memory while the program is running i.e. their lifetime is the entire program run. This is different than automatic variables as they remain in memory only when their function is running and are destroyed when the function is over.Function-level static variables are created and initialized the first time that they are used although the memory for then is allocated at program load time.A program that demonstrates function-level static variables in C is given as follows −Example Live Demo#include int func() { static int num = ... Read More
Use of the new operator signifies a request for the memory allocation on the heap. If the sufficient memory is available, it initializes the memory and returns its address to the pointer variable.The new operator should only be used if the data object should remain in memory until delete is called. Otherwise if the new operator is not used, the object is automatically destroyed when it goes out of scope. In other words, the objects using new are cleaned up manually while other objects are automatically cleaned when they go out of scope.The following is the syntax of new operator.pointer_variable ... Read More