C++ Clan

Moving Text - SCreen Saver in C++

1. #include<iostream>
2. #include<windows.h>
3. HANDLE out=GetStdHandle(STD_OUTPUT_HANDLE);
4. void clr(int y){SetConsoleTextAttribute(out,y);}
5. void go(int a,int b){COORD cord; cord.X = a; cord.Y = b; SetConsoleCursorPosition(out,cord);}
6. using namespace std;
7. void G(int x,int y)
8. {go(x,y);cout<<char(220)<<char(220)<<char(220)<<char(220)<<char(220)<<endl; y++;
9. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(219)<<endl; y++;
10. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(32)<<endl; y++;
11. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(223)<<char(219)<<endl; y++;
12. go(x,y);cout<<char(223)<<char(223)<<char(223)<<char(223)<<char(223)<<endl;}
13. void A(int x,int y)
14. {go(x,y);cout<<char(220)<<char(220)<<char(220)<<char(220)<<endl; y++;
15. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(219)<<endl; y++;
16. go(x,y);cout<<char(219)<<char(220)<<char(220)<<char(219)<<endl; y++;
17. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(219)<<endl; y++;
18. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(219)<<endl;}
19. void M(int x,int y)
20. {go(x,y);cout<<char(219)<<char(220)<<char(32)<<char(220)<<char(219)<<endl; y++;
21. go(x,y);cout<<char(219)<<char(32)<<char(287)<<char(32)<<char(219)<<endl; y++;
22. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(219)<<endl; y++;
23. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(219)<<endl; y++;
24. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(219)<<endl;}
25. void E(int x,int y)
26. {go(x,y);cout<<char(220)<<char(220)<<char(220)<<char(220)<<char(220)<<endl; y++;
27. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(32)<<endl; y++;
28. go(x,y);cout<<char(219)<<char(205)<<char(205)<<char(32)<<char(32)<<endl; y++;
29. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(32)<<endl; y++;
30. go(x,y);cout<<char(223)<<char(223)<<char(223)<<char(223)<<char(223)<<endl;}
31. void R(int x,int y)
32. {go(x,y);cout<<char(220)<<char(220)<<char(220)<<char(220)<<char(220)<<endl; y++;
33. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(32)<<char(219)<<endl; y++;
34. go(x,y);cout<<char(219)<<char(220)<<char(220)<<char(220)<<char(219)<<endl; y++;
35. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(219)<<char(32)<<endl; y++;
36. go(x,y);cout<<char(219)<<char(32)<<char(32)<<char(219)<<char(220)<<endl;}
37. int main()
38. {
39. int X=0,x1,x2,x3,x4,x5,x6,y=5; x1=0; x2=6; x3=12; x4=18; x5=24; x6=30;
40. for (int i=0;i<1;)
41. {clr(9);go(x1,y);G(x1,y);if(x1>72){x1=1;}x1++;clr(12);go(x2,y);A(x2,y);if(x2>72){x2=1;}x2++;
42. clr(6);go(x3,y);M(x3,y);if(x3>72){x3=1;}x3++;clr(9);go(x4,y);M(x4,y);if(x4>72){x4=1;}x4++;
43. clr(10);go(x5,y);E(x5,y);if(x5>72){x5=1;}x5++;clr(12);go(x6,y);R(x6,y);if(x6>72){x6=1;}x6++;
44. if(x1==2){y+=3;} if(y>50){y=3;}system("cls");}
45. return 0;
46. }

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Hollow Square & Hollow diamond & Hollow Triangle

1. Notice if any line of the shape is going to match original filled shape; i.e. in square the first line and last line are filled!
2. Make sure you know the ration of spaces for hollow part to the number of characters in the corresponding filled space i.e. if your square is of the size of 5x5 so it is going to be 5 characters in a single line; but in hollow shape you are going to print only 2 characters ; the first one and last one no matter how much long line is this; but here in 5 character line the total spaces would be countable as spaces=one side length - 2;

Prepare for the basic shapes looping that will be joined together to make final shape i.e. to make diamond you place 4 triangles together if you ever made it:

Hence by mixing these points you can make logic of this king of shapes.

Basic Hollow looping;

In this kind of looping you have to make sure that ration of lines is safely described to make appropriate loop

Square concept:

1. int main()
2. {
3.         int size;            //suppose it is 5
4.         cin>>size;
5.         for (int i = 0 ; i < size ; i++ ) //runs 5 times
6.          {
7.                  cout  <<  "*" ;          //first char
8.                  for (int j=2;j<size;j++) //runs 5-2 times
9.                  {
10.                      cout<<" ";
11.                  }
12.                  cout  <<  "*" ;          //last char
13.           }
14.    return 0;
15. }

Now here in line 8 you can see that formula which subtracts number of characters from hollow line to make it even to the rest of shape, it could be 5 - 3  or maybe  5-4  required for the program hence the distribution of spaces and loops as well; depending on the shape.

gotoxy() function :

Working: 

#include               // Header Files 
#include               // for getch() function 
#include               
#include             // Necessary when treating consoles  
using namespace std;
void gotoxy (int x, int y)
    {
         COORD coordinates;     // coordinates is declared as COORD
         coordinates.X = x;     // defining x-axis
         coordinates.Y = y;     //defining  y-axis
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coordinates);       
    }
int main()              
{
    int x;
    int y; 
 
    cout<<"Enter x: ";
    cin>>x;
    cout<<"Enter y: ";
    cin>>y;
        
    gotoxy(x,y);     // function call 
    cout<<"C++ Clan Umair Sajid"<<endl;
    getch();
    return EXIT_SUCCESS;
}

1. HANDLE Output=GetStdHandle(STD_OUTPUT_HANDLE);
2. void colour(int x)
3. {SetTextAttribute(Output,x);}

1. HANDLE Output=GetStdHandle(STD_OUTPUT_HANDLE);
2. void colour(char ch)
3. {
4. int x;
5. switch (ch)
6. {
7. case 'r':  x=12; break;                       //red
8. case 'b': x=9;   break;                        //blue
9. case 'g': x=10; break;                        //green
10. case 'a': x=11; break;                        //aqua
11. case 'v': x=13; break;                         //voilet
12. case 'y': x=14; break;                         //yellow
13. case 'w: x=15; break;                         //white
14. }
15.  SetTextAttribute(Output,x);
16. }

//Code by Umar Farooq
/**
 * follow us at http://CppQA.blogspot.com
 * 
**/
#include <iostream>
using namespace std;

int main() {
 int number = 12345678;
 cout<<"Reverse of number "<<number<<" is ";
 while(number)
 {
  cout<<number%10;
  number/=10;
 }
 
 return 0;
}

#include iostream.h
#include conio.h
#include windows.h
#include dos.h

void main()
{
 system("color 0a");
 cout<<"\n\n\n\t\t\t\tPlease wait while loading\n\n";
 char a=177, b=219;
 cout<<"\t\t\t\t";
 for (int i=0;i<=15;i++)
 cout<<a;
 cout<<"\r";
 cout<<"\t\t\t\t";
 for (int i=0;i<=15;i++)
 {
  cout<<b;
  for (int j=0;j<=1e8;j++); //You can also use sleep function instead of for loop
 }

 clrscr();
 cout<<"\n\n\n\t\t\tHELLO WORLD\n\n\t\t\tShashka made by Ivan :P";

 getch();
}

int main()
{
int x[2][2] , y[2][2] , z[2][2];
//for simplicity 2,2 matrix is used, but you can also make a user specified

int i , j , k;

cout<<"enter number for 1st matrix"<<endl; //applying for loop to enter the data

for( i = 0 ; i < 2 ; i++)
for( j = 0 ; j < 2 ; j++)
{
cin>>x[i][j];
}
 
cout<<"enter numbers for 2nd matrix"<<endl;
for( i = 0 ; i < 2 ; i++)
for( j = 0 ; j < 2 ; j++)
{
cin>>y[i][j];
}

for( i = 0 ; i < 2 ; i++)
for( j = 0 ; j < 2 ; j++)
{
z[i][j] = 0;
for( k = 0 ;k < 2 ; k++)
z[i][j]=x[i][j]+y[i][j]; // x + y stored in z
}

cout<<"additon of matrix is"<<endl;   // z is displayed
for( i = 0 ; i < 2 ; i++)
{
for( j = 0 ; j < 2 ; j++)
cout<<z[i][j]<<"\t";
cout<<"\n";
}
getch();
return 0;
}

Recursive functions

The first time i saw colour in c++ was amazing experience because just black  and white stuff is more like old school comparing to modern software and  technology. It was hard to find well defined code and definition for colours in c++ language ; took me a while but i got it finally so here is this code in simple language, hope it helps you...

In place of _ _ you have to enter colour combination you want ; first place takes background colour and 2nd place takes foreground colour (text colour) this is list of all colours available for this command:

1. #include <iostream>
2. #include <windows.h>
3. using namespace std;
4. int main()
5. {
6.            system("Color 0A");  // first 0 = black background second A = light green
7.            cout<<"This is my fev. colour combination for this command"<<endl;
8.       return 0;
9. }

The detailed coding

//Assign an array of 5 nameless pointers to a 2d pointer

int **pointer = new int*[5];



//then assign values to each array

for(int i=0;i<5; i++)

{

    pointer[] = new int[10];
}



//now we have a 2d pointer which can be also accessed as array

pointer[2][9] ; //this is third row and 10th element

int a=1;
int b=5;
int c=11;
int d=19;
int e=30;

//we shall now declare some arrays

//Suppose we want to make an array of 10 integer numbers. 
int array1[10];

// we can assign elements to the array like this:
int array1[10] = {2,4,6,8,10,12,14,16,18,20};
float array2[5] = {3.14, 2.27, 0.6990, 4.5, 123.4};
string array3[3] = {"Porsche", "Lamborghini" , "Maserati"};

//Note that in an array of 10 elements, values are indexed as 0-9


// now we can access the values in the array using their index number
print(array1[0]); // 0 is the index number of the element in the array
// we'll get 2 in the output

//similarly 

print(array2[3]); //This will print us 4.5
print(array3[1]); //This will print us Lamborghini


//In order to print every element of the array, we use for loop
for (int i=0; i<10; i++)
{
print(array1[i])
print(endl);
}
//This will print every element in the array1
//value of i will determine the index number of the element to be printed

//P.s. use cout statement instead of print command :)

#include <iostream>

using namespace std;
int main()
{
 int num,i=1,j=1,k=1,space,star;
 cout<<"Enter odd number of rows: ";
 cin>>num;
 if(num%2==0)
  num=num-1;

 space=num/2;
 star=1;
 cout<<endl;
 do
 { 
  if(space!=0)
   do //prints spaces
   {

    cout<<" ";
    k++;
   }while(k<=space);
   k=1;
   do //prints stars
   {
    cout<<"*";
    j++;
   }while(j<=star);
   j=1;
   cout<<endl;

   i++; //current row number for diamond
   if(i==(num/2)+1)
   {
    space=0;
    star=num;
   }

   if(i<=num/2)
   {
    star=star+2;
    space--;

   }

   if(i>1+num/2)
   {
    star=star-2;
    space++;
   }

   //star=2*i-1;
 }while(i<=num);
 return 0; 
}

Input in functions : type of input

#include <iostream>
#include <conio.h>

using namespace std;



int Factorial(int number)
{
 if (number <2)
 {
  return 1;
 }
 else
 {
  return (number * Factorial(number - 1));
 }
}

void main()
{
 int num;
 cout << "Enter Number: ";
 cin  >> num;

 int fact = Factorial(num);
 cout << "\nFactorial: " << fact;

 _getch(); //use 'getch()' if you are using version older than Visual Studio 2013.
}

Macros In C++ By Umair Sajid

#include<iostream>
#define SQUARE num*num      // MACROS
#define CUBE num*num*num    // MACROS
using namespace std;
int main()
{
    int num;
    cout<<"\n\t\tEnter A Number : "; // prompt to enter a number
    cin>>num;               // store it in num

    cout<<"\n\t\tThe Square of "<<num<<" is : "<<SQUARE<<"\n";   // Just as function call we have used
    cout<<"\n\t\tThe Cube of "<<num<<" is :"<<CUBE;                     // macros
    cout<<"\n\n";
    cout<<"\n\t\t***THANKYOU PC Umair Sajid ****\n\n";
}

int apples = 10 ; 

apples = apples + 1 ;     //increments by 1

apples = apples - 1 ;     //decrements by 1 

//now apples ==10



//in C++ we can do this more easily with increment and decrement operators.



apples++; //increments

apples--; //decrements



Type of increment/decrement operators



PostFix: it changes value of variable after rest of the statement is executed.

Prefix: it changes value before any other calculation.



e.g.



int oranges = apples++;

/*

oranges will now be 10 and after execution apples value will increase by 1 so  apples=1

*/

//similarly this will result in 10 oranges and 10 apples

oranges = --apples; //first apples will be set to 10(11-1) and then oranges = apples = 10;



/* We can see in the above example that --apples/++apples or vice versa changes the value of apples. The compiler reads the following line : */
oranges = ++apples ;
// change apples = apples+1. Then set the value of Oranges = apples (new value)


/*So the statement has altered the original value of apples.
// If we do not want to change the value of apples and still set the value of oranges, then we do the following : */


oranges = apples+1;
//So the value of apples remains intact and +1 value is set for oranges :)