C++ programming

class in c++




  1. #include<iostream>
  2. #include<string.h>
  3. using namespace std;
  4. class shafiq
  5. {
  6. bool con;
  7. char a;
  8. int b;
  9. float c;
  10. double d;
  11. long e;

  13. public:
  14. shafiq();
  15. ~shafiq();
  16. void get();
  17. void show();
  19. private:

  21. }
  22. ;

  24. shafiq::shafiq():con(0),a('0'),b(0),c(0),d(0),e(0)
  25. {
  26. }

  28. shafiq::~shafiq()
  29. {
  30. }
  31. void choise(shafiq std)
  32. {
  33. int ch;
  34. do
  35. {
  36. cout << "You are in choise function " << endl ;
  37. cout << "Plz enter your choise " << endl ;
  38. cin>>ch;
  39. switch(ch)
  40. {
  41. case 1:
  42. std.get();
  43. break;

  45. case 2:
  46. std.show();
  47. break;


  50. default:
  51. cout << "Press any key to continue . . ." << endl ;
  52. }
  53. }while(ch!=0);
  54. }
  55. void shafiq::get()
  56. {
  57. cin>>con;
  58. cin>>a;
  59. cin>>b;
  60. cin>>c;
  61. cin>>d;
  62. cin>>e;
  63. }
  64. void shafiq::show()
  65. {
  66. cout << "BOOL " <<con << endl ;
  67. cout << "char  " <<a << endl ;
  68. cout << "int" << b << endl ;
  69. cout << "float " << c << endl ;
  70.     cout << "double" << d << endl ;
  71. cout << "long" << e << endl ;
  72. }


  75. void main()
  76. {
  77. shafiq std;

  79.  choise(std);

  82. system("pause");
  84. }

Class Constructor and Destructor


  1. #include<iostream>
  2. using namespace std;
  3.  int flag=0;//global variable 
  4. class student
  5. {
  6. public:
  7. student();//default constructor
  8. student(int tid,int tmarks);//argumeted constructor 
  9. ~student();//destructor
  10.     void  showid()//function for show id 
  11. {
  12. cout << id << endl;
  13. }
  14. void  showmarks()//function for showing marks
  15. {
  16. //by default this function if inline function
  17. cout <<  marks << endl ;
  18. }
  20. void show_data();
  21. {
  22. cout <<" id is " << id << endl ;
  23. cout <<" marks is " << marks << endl ;
  24. }
  25. private:

  27. int id;
  28. int marks;
  29.  
  30. };

  32. student::student()//default constructor defination 
  33. {
  34. cout << "you are in constructor " << endl ;
  35. id=0;
  36. marks=0;
  37. flag++;

  39. }

  41. student ::student(int tid, int tmarks)//argumented constructor defination
  42. {
  43. cout << "you are in argumented constructor " << endl ;
  44. id=tid;
  45. marks=tmarks;
  46. flag++;
  47. }
  48. student::~student()//defination of destructor 
  49. {
  50. cout << "you are in destructor " << endl ;
  51. flag++;
  52. }

  54. void main()
  55. {
  56. int flag=100;
  57. student st;
  58. student std(23,2324);
  59. std.showid();
  60. std.showmarks();
  61. std.~student();
  62. cout << "value of flag " << ::flag <<endl;

  64. system("pause");
  65.  
  66. }



  1. // =======================================================
  2. // This program adds two numbers and then averages them.
  3. // =======================================================
  4. #include <iostream>
  5. using namespace std;
  6.  
  7. int main ()
  8. {
  9.        double num1 = 0;
  10.        double num2 = 0;
  11.        double total = 0;
  12.        double avg = 0;

  14.        cout << "Please enter a number: ";
  15.        cin >> num1;
  16.        cout << "Please enter a second number: ";
  17.        cin >> num2;
  18.  
  19.        total = num1 + num2;
  20.        cout << "\nThe total of the two numbers is: " << total << "\n";
  21.  
  22.        avg = (total / 2);
  23.  
  24.        cout << "The average of the two numbers is: " << avg << "\n\n";
  25.  
  26.        return 0;
  27. }
  28. /* ===================== output ==================================
Please enter a number: 88.6
Please enter a second number: 75.3

The total of the two numbers is: 163.9
The average of the two numbers is: 81.95

Press any key to continue . . .
*/// =============================================================

C++ Source Code: Count even numbers using a: for loop C++
// - Count even numbers using a for loop
#include <iostream>
using namespace std;
int main()
{
for (int count = 0; count <= 26; count += 2)
{
cout << count << ", ";
}
cout << endl;
return 0;
}

/*==================[output]======================
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26,
Press any key to continue . . .
=================================================*/
// end of program

To Print N on screen



  1. #include<iostream>
  2. using namespace std;

  4. void main()
  5. {
  6. int length=10;
  7. for (int i = 0; i <= length; i++)
  8. {
  9. for (int j = 0; j <= length; j++)
  10. {
  11. if(i==j ||j==0 ||j==length)
  12. cout<<"*";
  13. else
  14. cout<<" ";
  15. }
  16. cout<<endl;

  18. }
  19.  
Out put :


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