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Mastery 24

Posted on 06/05/2015 by Mauricio Cooper | Comments Off

Creation and use of arrays in C++

C++ provides a data structure, the array, which stores a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Instead of declaring individual variables, such as number0, number1, …, and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and …, numbers[99] to represent individual variables. A specific element in an array is accessed by an index.

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.

Declaring Arrays:

To declare an array in C++, the programmer specifies the type of the elements and the number of elements required by an array as follows:

#d6d6d6;">type arrayName [ arraySize ];

This is called a single-dimension array. The arraySize must be an integer constant greater than zero and type can be any valid C++ data type. For example, to declare a 10-element array called balance of type double, use this statement:

#d6d6d6;">double balance[10];

Initializing Arrays:

You can initialize C++ array elements either one by one or using a single statement as follows:

#d6d6d6;">double balance[5] = {1000.0, 2.0, 3.4, 17.0, 50.0};

The number of values between braces { } can not be larger than the number of elements that we declare for the array between square brackets [ ]. Following is an example to assign a single element of the array:

If you omit the size of the array, an array just big enough to hold the initialization is created. Therefore, if you write:

#d6d6d6;">double balance[] = {1000.0, 2.0, 3.4, 17.0, 50.0};

You will create exactly the same array as you did in the previous example.

#d6d6d6;">balance[4] = 50.0;

The above statement assigns element number 5th in the array a value of 50.0. Array with 4th index will be 5th, i.e., last element because all arrays have 0 as the index of their first element which is also called base index. Following is the pictorial representaion of the same array we discussed above:

Credits:

http://www.tutorialspoint.com/cplusplus/cpp_arrays.htm

http://www.cplusplus.com/doc/tutorial/arrays/

#TC1017 #Mastery24

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Mastery 20

Posted on 06/05/2015 by Mauricio Cooper | Comments Off

Use of loops with “for”

A for loop is a repetition control structure that allows you to efficiently write a loop that needs to execute a specific number of times.

Syntax:

The syntax of a for loop in C++ is:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">for ( init; condition; increment )
{
   statement(s);
}

Here is the flow of control in a for loop:

The init step is executed first, and only once. This step allows you to declare and initialize any loop control variables. You are not required to put a statement here, as long as a semicolon appears.
Next, the condition is evaluated. If it is true, the body of the loop is executed. If it is false, the body of the loop does not execute and flow of control jumps to the next statement just after the for loop.
After the body of the for loop executes, the flow of control jumps back up to theincrement statement. This statement allows you to update any loop control variables. This statement can be left blank, as long as a semicolon appears after the condition.
The condition is now evaluated again. If it is true, the loop executes and the process repeats itself (body of loop, then increment step, and then again condition). After the condition becomes false, the for loop terminates.

Flow Diagram:

Example:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-image: url('http://www.tutorialspoint.com/cplusplus/images/try-it.jpg') !important; background-attachment: initial !important; background-color: #eeeeee !important; background-size: initial !important; background-origin: initial !important; background-clip: initial !important; background-position: 100% 0%; background-repeat: no-repeat !important;">#include 
using namespace std;
 
int main ()
{
   // for loop execution
   for( int a = 10; a  20; a = a + 1 )
   {
       cout  "value of a: "  a  endl;
   }
 
   return 0;
}

When the above code is compiled and executed, it produces the following result:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">value of a: 10
value of a: 11
value of a: 12
value of a: 13
value of a: 14
value of a: 15
value of a: 16
value of a: 17
value of a: 18
value of a: 19

Credits:

http://www.tutorialspoint.com/cplusplus/cpp_for_loop.htm

#TC1017 #Mastery20

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Mastery 19

Posted on 06/05/2015 by Mauricio Cooper | Comments Off

Use of loops with “while”

A while loop statement repeatedly executes a target statement as long as a given condition is true.

Syntax:

The syntax of a while loop in C++ is:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">while(condition)
{
   statement(s);
}

Here, statement(s) may be a single statement or a block of statements. The condition may be any expression, and true is any non-zero value. The loop iterates while the condition is true.

When the condition becomes false, program control passes to the line immediately following the loop.

Flow Diagram:

Here, key point of the while loop is that the loop might not ever run. When the condition is tested and the result is false, the loop body will be skipped and the first statement after the while loop will be executed.

Example:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-image: url('http://www.tutorialspoint.com/cplusplus/images/try-it.jpg') !important; background-attachment: initial !important; background-color: #eeeeee !important; background-size: initial !important; background-origin: initial !important; background-clip: initial !important; background-position: 100% 0%; background-repeat: no-repeat !important;">#include 
using namespace std;
 
int main ()
{
   // Local variable declaration:
   int a = 10;

   // while loop execution
   while( a  20 )
   {
       cout  "value of a: "  a  endl;
       a++;
   }
 
   return 0;
}

When the above code is compiled and executed, it produces the following result:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">value of a: 10
value of a: 11
value of a: 12
value of a: 13
value of a: 14
value of a: 15
value of a: 16
value of a: 17
value of a: 18
vuale of a: 19

Credits:

http://www.tutorialspoint.com/cplusplus/cpp_while_loop.htm

#TC1017 #Mastery18

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Mastery 18

Posted on 06/05/2015 by Mauricio Cooper | Comments Off

Nesting of conditional statements

It is always legal to nest if-else statements, which means you can use one if or else if statement inside another if or else if statement(s).

Syntax:

The syntax for a nested if statement is as follows:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">if( boolean_expression 1)
{
   // Executes when the boolean expression 1 is true
   if(boolean_expression 2)
   {
      // Executes when the boolean expression 2 is true
   }
}

You can nest else if…else in the similar way as you have nested if statement.

Example:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; cursor: default; background-image: url('http://www.tutorialspoint.com/cplusplus/images/try-it.jpg') !important; background-attachment: initial !important; background-color: #eeeeee !important; background-size: initial !important; background-origin: initial !important; background-clip: initial !important; background-position: 100% 0%; background-repeat: no-repeat !important;">#include 
using namespace std;
 
int main ()
{
   // local variable declaration:
   int a = 100;
   int b = 200;
 
   // check the boolean condition
   if( a == 100 )
   {
       // if condition is true then check the following
       if( b == 200 )
       {
          // if condition is true then print the following
          cout  "Value of a is 100 and b is 200"  endl;
       }
   }
   cout  "Exact value of a is : "  a  endl;
   cout  "Exact value of b is : "  b  endl;
 
   return 0;
}

When the above code is compiled and executed, it produces the following result:

#d6d6d6; font-size: 12px; overflow: auto; color: #313131; background-color: #eeeeee;">Value of a is 100 and b is 200
Exact value of a is : 100
Exact value of b is : 200

Credits:

http://www.tutorialspoint.com/cplusplus/cpp_nested_if.htm

#TC1017 #Mastery18

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Use of loops with “while” – Mastery 19

Posted on 05/05/2015 by Oswaldo Uliel | Comments Off

Como usar un loop con “while”

Antes de empezar tenemos que saber que es un loop; es una serie de acciones que se repiten en este caso, con ayuda del while, las instrucciones dentro del loop van a repetirse mientras algo este pasando, como en el siguiente ejemplo:

#include
	#include
	#include

	using namespace std;

	int main()
	{
	int sec, num, cont =0;
	srand(time(NULL));
	sec = rand()%100+1;

	while(num != sec){
	cout
	cin >> num;

	if (num > sec){
	cout
	}
	if (num
	cout
	}
	cont++;
	}

	cout
	cout

	return 0;

En el ejempo anterior existe un loop con while, este nos indica que mientras la condicional sea false, todo el loop va a repetirse, pero si el usuario ingresa un numero correcto que para nuestro codigo seria el 42, la variable num seria true, por lo que la condicion del while ya no se cumple y el loop se saldria y el programa continuaria corriendo.

#TC1017 #Mastery19

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#Mastery14 #TC1017

Posted on 05/05/2015 by Joshua B. G. | Comments Off

Creación y uso de librerias creadas por uno mismo.

Una de las herramientas que te deja usar los programas de programación es la facilidad de poder usar tus propias librerias estas librerias se pueden crear para definir variables con un significado mas especifico.

uno de los casos mas usados en la declaracion de librerias es el #Define una libreria que te permite utilizar el nombre de una variable y darle usos especificos ya sean de sistema, secuenciales y condicionales.

Un ejemplo que muchos usaron para la realización de su sudoku es la implementación de colores, para esto, muchos definieron cada color, para así, poder ponerlos mas facilmente


	#define GREEN “33[32m”
	#define PURPLE “33[35m”
	#define BLUE “33[34m”
	#define WHITE “33[37m”
	#define BLU “33[36m”
	#define YELLOW “33[33m”

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When to use what type of repetition in a program

Posted on 30/04/2015 by Pablo | Comments Off

#Mastery22 #TC1014 @PablO_CVi

The for statement iterates through a collection or iterable object or generator function.

The while statement simply loops until a condition is False.

It isn’t preference. It’s a question of what your data structures are.

Often, we represent the values we want to process as a range (an actual list), or xrange (which generates the values). This gives us a data structure tailor-made for the for statement.

Generally, however, we have a ready-made collection: a set, tuple, list, map or even a string is already an iterable collection, so we simply use a for loop.

In a few cases, we might want some functional-programming processing done for us, in which case we can apply that transformation as part of iteration. The sorted and enumerate functions apply a transformation on an iterable that fits naturally with the for statement.

If you don’t have a tidy data structure to iterate through, or you don’t have a generator function that drives your processing, you must use while.

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#TC1017 #QUIZ11

Posted on 28/04/2015 by Alejandra Jacobo Gómez | Comments Off

#TC1017 #QUIZ11

Something new that I learned:

ifstream myfile;
	myfile.open (filename);

—-this is for open a file 😀

Quizz 1

https://github.com/alejcbgmz/WSQ-s-Ale-Jcb-Gmz/blob/master/banana1.cpp

Quizz 2

https://github.com/alejcbgmz/WSQ-s-Ale-Jcb-Gmz/blob/master/banana2.cpp

P.D when you insert the name of the text file remember write .txt at the end 😀

I used

http://c.conclase.net/curso/?cap=039

https://www.youtube.com/watch?v=Iho2EdJgusQ

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#WSQ14 #TC1014 #LaNieveDeColimaExploto #PenguinLove

Posted on 08/04/2015 by Omar Chavez | Comments Off

Here is my WSQ 14.

I took a little of information from a page that Ken gave us that is this one: http://en.wikipedia.org/wiki/E_%28mathematical_constant%29

GitHub: https://github.com/chocotorroblue/WSQ-S/blob/master/wsq14.py

Image:

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Mastery 17

Posted on 06/04/2015 by Mauricio Cooper | Comments Off

Use of “switch” as a conditional

A switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each case.

Syntax:

The syntax for a switch statement in C++ is as follows:

switch(expression){
    case constant-expression  :
       statement(s);
       break; //optional
    case constant-expression  :
       statement(s);
       break; //optional
  
    // you can have any number of case statements.
    default : //Optional
       statement(s);
}

The following rules apply to a switch statement:

The expression used in a switch statement must have an integral or enumerated type, or be of a class type in which the class has a single conversion function to an integral or enumerated type.
You can have any number of case statements within a switch. Each case is followed by the value to be compared to and a colon.
The constant-expression for a case must be the same data type as the variable in the switch, and it must be a constant or a literal.
When the variable being switched on is equal to a case, the statements following that case will execute until a break statement is reached.
When a break statement is reached, the switch terminates, and the flow of control jumps to the next line following the switch statement.
Not every case needs to contain a break. If no break appears, the flow of control will fall throughto subsequent cases until a break is reached.
A switch statement can have an optional default case, which must appear at the end of the switch. The default case can be used for performing a task when none of the cases is true. No break is needed in the default case.

#TC1017 #Mastery17

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Tag Archives: #eeeeee

Mastery 24

Declaring Arrays:

Initializing Arrays:

Mastery 20

Syntax:

Flow Diagram:

Example:

Mastery 19

Syntax:

Flow Diagram:

Example:

Mastery 18

Syntax:

Example:

Use of loops with “while” – Mastery 19

#Mastery14 #TC1017

When to use what type of repetition in a program

#TC1017 #QUIZ11

#TC1017 #QUIZ11

—-this is for open a file 😀

Quizz 1

https://github.com/alejcbgmz/WSQ-s-Ale-Jcb-Gmz/blob/master/banana1.cpp

Quizz 2

https://github.com/alejcbgmz/WSQ-s-Ale-Jcb-Gmz/blob/master/banana2.cpp

P.D when you insert the name of the text file remember write .txt at the end 😀

#WSQ14 #TC1014 #LaNieveDeColimaExploto #PenguinLove

Mastery 17

Syntax:

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