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https://www.programiz.com/cpp-programming/pointers-arrays

// C++ Program to insert and display data entered by using pointer notation.


using namespace std;

int main() {
float arr[5];

// Insert data using pointer notation
cout > *(arr + i) ;

}

// Display data using pointer notation
cout

// C++ Program to display address of each element of an array


using namespace std;

int main()
{
float arr[3];

// declare pointer variable
float *ptr;

cout

using namespace std;

int main() {
int numbers[2][3];

cout numbers[i][j];
}
}

cout

// C++ Program to display all elements
// of an initialised two dimensional array


using namespace std;

int main() {
int test[3][2] = {{2, -5},
{4, 0},
{9, 1}};

// use of nested for loop
// access rows of the array
for (int i = 0; i < 3; ++i) {

// access columns of the array
for (int j = 0; j < 2; ++j) {
cout

// Working of implicit type-conversion


using namespace std;

int main() {
// assigning an int value to num_int
int num_int = 9;

// declaring a double type variable
double num_double;

// implicit conversion
// assigning int value to a double variable
num_double = num_int;

cout

// program to find the sum of positive numbers
// if the user enters a negative numbers, break ends the loop
// the negative number entered is not added to sum


using namespace std;

int main() {
int number;
int sum = 0;

while (true) {
// take input from the user
cout > number;

// break condition
if (number < 0) {
break;
}

// add all positive numbers
sum += number;
}

// display the sum
cout