pointers in c 2b 2b

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showing results for - "pointers in c 2b 2b"
Sophia
30 Oct 2019
1#include <iostream>
2using namespace std;
3int main(){
4   //Pointer declaration
5   int *p, var=101;
6 
7   //Assignment
8   p = &var;
9
10   cout<<"Address of var: "<<&var<<endl;
11   cout<<"Address of var: "<<p<<endl;
12   cout<<"Address of p: "<<&p<<endl;
13   cout<<"Value of var: "<<*p;
14   return 0;
15}
Gael
24 Sep 2018
1int myvar = 6;
2int pointer = &myvar; // adress of myvar
3int value = *pointer; // the value the pointer points to: 6
Lucas
20 Aug 2020
1#include <iostream>
2
3using namespace std;
4
5int main () {
6   int  var = 20;   // actual variable declaration.
7   int  *ip;        // pointer variable 
8
9   ip = &var;       // store address of var in pointer variable
10
11   cout << "Value of var variable: "; 
12   cout << var << endl; //Prints "20"
13
14   // print the address stored in ip pointer variable
15   cout << "Address stored in ip variable: ";
16   cout << ip << endl; //Prints "b7f8yufs78fds"
17
18   // access the value at the address available in pointer
19   cout << "Value of *ip variable: ";
20   cout << *ip << endl; //Prints "20"
21
22   return 0;
23}
Juan Martín
08 May 2019
1Every object in C++ has access to its own address through an important pointer called this pointer.
2 The this pointer is an implicit parameter to all member functions. 
3Therefore, inside a member function,
4 this may be used to refer to the invoking object.
5
6Friend functions do not have a this pointer,
7 because friends are not members of a class. 
8Only member functions have a this pointer.
Odette
01 Apr 2016
1void simple_pointer_examples() {
2    int   a;  // a can contain an integer
3	int*  x;  // x can contain the memory address of an integer. 
4 	char* y;  // y can contain the memory address of a char. 
5 	Foo*  z;  // z can contain the memory address of a Foo object.  
6 
7    a = 10;
8    x = &a;   // '&a' extracts address of a 
9  
10    std::cout <<  x << std::endl; // memory address of a => 0x7ffe9e25bffc
11    std::cout << *x << std::endl; //          value of a => 10
12}
Mariam
01 May 2018
1void one() { cout << "One\n"; }
2void two() { cout << "Two\n"; }
3
4
5int main()
6{
7	void (*fptr)(); //Declare a function pointer to voids with no params
8
9	fptr = &one; //fptr -> one
10	*fptr(); //=> one()
11
12	fptr = &two; //fptr -> two
13	*fptr(); //=> two()
14
15	return 0;
16}
17
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