Correcciones a la parte de ingles

README-en.md

 
 ## Functions
 
-In mathematics, a function $$f$$ is a rule that is used to assign to each element $$x$$ from a set called *domain*, one (and only one) element $$y$$ from a set called *range*. This rule is commonly represented with an equation, $$y=f(x)$$. The variable $$x$$ is the parameter of the function and the variable $$y$$ will contain the result of the function. A function can have more than one parameter, but only one result. For example, a function can have the form $$y=f(x_1,x_2)$$ where there are two parameters, and for each pair $$(a,b)$$ that is used as an argument in the function, and the function will only one value of $$y=f(a,b)$$. The domain of the function tells us the type of value that the parameter should have and the range tells us the value that the returned result will have.
+In mathematics, a function $$f$$ is a rule that is used to assign to each element $$x$$ from a set called *domain*, one (and only one) element $$y$$ from a set called *range*. This rule is commonly represented with an equation, $$y=f(x)$$. The variable $$x$$ is the parameter of the function and the variable $$y$$ will contain the result of the function. A function can have more than one parameter, but only one result. For example, a function can have the form $$y=f(x_1,x_2)$$ where there are two parameters, and for each pair $$(a,b)$$ that is used as an argument in the function, the function will only have one value of $$y=f(a,b)$$. The domain of the function tells us the type of value that the parameter should have and the range tells us the value that the returned result will have.
 
 Functions in programming languages are similar. A function has a series of instructions that take the assigned values as parameters and performs a certain task. In C++ and other programming languages, functions return only one result, as it happens in mathematics. The only difference is that a *programming* function could possibly not return any value (in this case the function is declared as `void`). If the function returns a value, we use the instruction `return`. As in math, you need to specify the types of values that the function's parameters and result will have; this is done when declaring the function.
 
 
 #### Instructions
 
-1. Load the project `DVDInfo` into `QtCreateor`. There are two wayss to do this: 
+1. Load the project `DVDInfo` into `QtCreateor`. There are two ways to do this: 
 
       * Using the virtual machine: Double click the file `DVDInfo.pro` located in the folder `home/eip/labs/functions-dvdinfo` of your virtual machine. 
       * Downloading the project's folder from `Bitbucket`: Use a terminal and write the command `git clone http://bitbucket.org/eip-uprrp/functions-dvdinfo` to download the folder `functions-dvdinfo` from `Bitbucket`. Double click the file `DVDInfo.pro` located in the folder that you downloaded to your computer. 
 
      ```
      showMovie
-     showMovies (las dos)
+     showMovies 
      getMovieName
      getMovieByName
      ```
 
 3. Implement an overloaded function `getMovieInfo` that returns the name of the studio as well as the name, rating, year and genre. Call the function `getMovieInfo` in `main()` to display the name, studio, rating, year and genre of the movie in the position 75125 and demonstrate its functionality.
 
-4. Implement a function `showMovieInLine` that **displays** the information the information displayed by `showMovie`, but in a single line. The function should have a parameter to receive a string of information of the movie. Call the function `showMovieInLine` in `main()` to display the information for the movie in position 75125 to demonstrate its functionality. 
+4. Implement a function `showMovieInLine` that **displays** the information displayed by `showMovie`, but in a single line. The function should have a parameter to receive a string of information of the movie. Call the function `showMovieInLine` in `main()` to display the information for the movie in position 75125 to demonstrate its functionality. 
 
 5. Implement a function `showMoviesInLine` that **displays** the same information displayed by `showMovies` (all of the movies within a range of positions) but in a single line per movie. For example, a function call would be: `showMoviesInLine(file, 148995, 149000);`. Call the function `showMoviesInLine` in `main()` to display the information and demonstrate its functionality.
 
 
 [1] http://mathbits.com/MathBits/CompSci/functions/UserDef.htm
 
-[2] http://www.digimad.es/autoria-dvd-duplicado-cd-video.html
+[2] http://www.digimad.es/autoria-bluray-dvd-duplicado-cd-video.html
 
 [3] http://www.soft32.com/blog/platforms/windows/keep-your-dvd-collection-up-to-date-with-emdb-erics-movie-database/