Using C/C++, declare three integer variables (e.g. A, B, C) in main() and assign

Question

Using C/C++, declare three integer variables (e.g. A, B, C) in main() and assign their values from standard input (cin). Then call a function swap 1() to swap their values through pointers (e.g. A, B. C are 4, 5 and 6. after calling swap(). A has B's value 5, B has C's value 6, and C has As value 4). and output A, B, and C; finally, define another function swap 2 to swap A, B, C one more time using references Using C/C++, define an integer pointer in main(), and use this pointer to dynamically allocate an integer array with 50 elements; assign the array with random numbers in range [0, 999]. Then, pass the array as parameters) to a function prime_count() which counts the number of the integers that are prime, and prints those integers, after the function call, print the "counter" result; finally, use delete to deallocate the array memories. Note that you need to define a Boolean function prime() which tells whether an integer is prime or not. This function will be called and used by prime_count() to tell whether the numbers in the array are prime or not. Redo programs of 1 and 2 by using separate header and source files: declaring the functions in header files, and implementing functions in source files.

Explanation / Answer

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#include<iostream.h>

//using namespace std;

void swap1(int *num1, int *num2, int *num3)

{

   int temp;

   temp = *num1;

   *num1 = *num2;

   *num2 = *num3;

   *num3 = temp;

}

void swap2(int &a, int &b, int&c)

{

   int temp;

   temp=a;

   a=b;

   b=c;

   c=a;

}

int main()

{

   int a,b,c;

   cout<<“ Enter the value of A: ”;

   cin>>a;

   cout<<“ Enter the value of B: ”;

   cin>>b;

   cout<<“ Enter the value of C: ”;

   cin>>c;

   swap1(&a,&b,&c);

   swap2(a,b,c);

   cout<<“ After Swapping:”;

   cout<<“ A,B,C: ”<<a<<“ ”<<b<<“ ”<<c;

   return 0;

}

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