The solution offered in the C language is known as the switch-case structure. The switch-case structure allows you to code decisions in a C program based on a single value.
Exercise 1: Create a new project using the code from Multiple Choice. Just type it in. Build it. Run it a few times, trying various values to see how it responds. Examine the source code in your editor, where you can reference the line numbers mentioned in the following paragraphs. The switch-case structure starts at Line 10 with the switch statement.Ex1. C Programming - Calculator (Menu Driven)
The item it evaluates is enclosed in parentheses. Unlike an if statement, switch eats only a single value.Morph targets unity
The case part of the structure is enclosed in curly brackets, between Lines 11 and A case statement shows a single value, such as 1 in Line The value is followed by a colon. The value specified by each case statement is compared with the item specified in the switch statement. If the values are equal, the statements belonging to case are executed. The break keyword stops program flow through the switch-case structure. After the final comparison, the switch-case structure uses a default item, shown in Line The default item is required in the switch-case structure.
Exercise 2 : Construct a program using source code similar to Listingbut make the input the letters A, B, and C. When the comparison is true, which means that both items are equal to each other, the statements belonging to case are executed.Remember Me?
C++ Menu driven program to Insert(), Display(), Delete() in a linked queue.
Thread: How to make a menu on C? How to make a menu on C? Hello, Can somebody explain me how to make a menu in C? The menu must call another functions and validate that I enter a valid key, when I hit enter in the other screen it must go back to the main menu For example. Sum 2. Rest Press function to continue. If I press 1.
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The whole screen must be blank and show me something like Enter digit number 1: Enter digit number 2: The result is : Press Enter to go the main menu.
Thanks for your help.Vmxnet rx jumbo
You can try this Code:. It didnt work. You didn't use the switch statement correctly, it's meant to be something like this: Code:. Last edited by 0rion; at PM. Thank you very much. Its working now. Of course you could always just read the FAQ too Hope is the first step on the road to disappointment.
I'm sure he is grateful that someone did his homework for him. I dont understand the last part you gave me. How should I use that on my program? Oh, I don't know. Perhaps the FAQ will tell you. Don't you even understand basic logic?
Where do you think you'd put something to potentially clear the screen? Hey, I know, how about some place in your program where you want it to clear the screen!
I alredy included conio. This is why you either need to take a moment to look things up on your own ie: You'd be done by now, instead of waiting for some one to answer you. If I dont have clrscr in my conio.An array is a variable that can store multiple values. For example, if you want to store integers, you can create an array for it. Here, we declared an array, markof floating-point type.
And its size is 5. Meaning, it can hold 5 floating-point values. Suppose you declared an array mark as above. The first element is markthe second element is mark and so on. Here, we haven't specified the size. However, the compiler knows its size is 5 as we are initializing it with 5 elements. Here's how you can print an individual element of an array. Now let's say if you try to access testArray. The element is not available.
creating menu for C program - need help urgently please!!!
This may cause unexpected output undefined behavior. Sometimes you might get an error and some other time your program may run correctly. In the next tutorial, you will learn about multidimensional arrays array of an array. Course Index Explore Programiz. Popular Tutorials Data Types in C. C for Loop.
Arrays in C Programming. Pointers in C. Find roots of a quadratic equation. Print Pyramids and Patterns. Check prime number. Print the Fibonacci series.
Reference Materials string. Start Learning C.Almost all the programmers or every Computer science student in the wild would have practiced C programming, some might have just memorized few programs for the sake of exams. But still, those who really gained the knowledge to write C programs would have missed out all the interesting concepts of C, and Curses is one of them, available on all Linux and Unix variants.
You can run Curses with Cygwin for Windows. Now after years of development and with new features added it is called as Ncurses New Curses. Programming with NCurses will be lot more interesting because of the formatted output, but it is lot more than that. You can control every input including keyboard and mouse, as well as the output. But before going into the program we will see how Ncurses handles the rows and columns of the terminal screen.
The above image shows how curses library maps the screen into rows and columns. As always programmers count form zero. The above sample code will draw a box with menu items printed and the first menu item highlighted.
And will wait for the user input, upon pressing the up and down arrow keys you can navigate the menu. Here is the code break-down and instruction on how to run a C program with Ncurses library.
First we should include the ncurses. Then we create a new window, with the newwin function. Then the call to box function defines a window border clearly, so that you can have make it standout on your terminal screen, also know that, this just draws border, which is prone to overwriting and accidental erasing. After creating the window we print all the menu items one below the other and highlight the first item.
Then we disable echo and enable keypad to capture the special keys and navigate the menu. We are also using sprintf to right pad the string with spaces to display them with even width.
The above program will give you the following output, You can also expand it to the most advanced menu or bar menu or as you wish. Happy coding!! Founder of Techlister. Love to build sites using Wordpress and Joomla. Interested in Astronomy. Your email address will not be published.
How to Use the Switch-Case Structure for Multiple-Choice Decisions in C Programming
Creating menu with Ncurses in C. Compiling and linking Ncurses programs You should compile Ncurses programs by linking it to Ncurses library like this. How to Block failed SSH logging attempts?
I want to do Graphics programming in C. I had searched a lot about the compiler that provides a rich set of functions for doing GUI programming in C, but I couldn't find anything. Basically I want to draw buttons and then accept the choice from the user and take an appropriate action.
It would be helpful if you can suggest a C compiler, or a library that I can add to my compiler. I am working on the Windows operating system. Any help would be appreciated. This is guaranteed to have nothing to do with the compiler. All compilers do is compile the code that they are given.
What you're looking for is a GUI library, which you can write code against using any compiler that you want. Of course, that being said, your first order of business should be to ditch Turbo C.
That compiler is about 20 years old and continuing to use it isn't doing you any favors. You can't write modern GUI applications, as it will only produce bit code. All modern operating systems are bit, and many are now bit. It's also worth noting that bit editions of Windows will not run bit applications natively. You'll need an emulator for that; it's not really going to engender much feeling of accomplishment if you can only write apps that work in a DOS emulator.
It includes the same compiler available in the full version of the suite. It allows you to write native Windows applications that have access to the full set of GUI controls. If you choose to go with Visual Studio, it also includes boilerplate code for a blank WinAPI application that will get you up and running quickly. If you really care about learning to do this, Charles Petzold's Programming Windows is the canonical resource of the subject, and definitely worth a read.
That's the way I'd do it, at least. As the other answers suggest, GTK is also an option.
But the applications it generates are just downright horrible-looking on Windows. EDIT: Oh dear It looks like you're not alone in wanting to write "GUI" applications using an antiquated compiler.
If you're another one of those poor people stuck in the hopelessly out-of-date Indian school system and forced to use Turbo C to complete your education, this might be an option. I'm loathe to recommend it, as learning to work around its limitations will be completely useless to you once you graduate, but apparently it's out there for you if you're interested.
With this library you can easily create some buttons for your example.We will learn about for loop in this tutorial. In the next tutorial, we will learn about while and do This process goes on until the test expression is false. When the test expression is false, the loop terminates.
To learn more about test expression when the test expression is evaluated to true and falsecheck out relational and logical operators. The value entered by the user is stored in the variable num.
Suppose, the user entered The count is initialized to 1 and the test expression is evaluated. Again, the test expression is evaluated. Since 2 is also less than 10, the test expression is evaluated to true and the body of for loop is executed. Now, the sum will equal 3.
When the count is 11, the test expression is evaluated to 0 falseand the loop terminates. We will learn about while loop and do Course Index Explore Programiz. Popular Tutorials Data Types in C. C for Loop. Arrays in C Programming. Pointers in C. Find roots of a quadratic equation. Print Pyramids and Patterns.Ontario county arrests
Check prime number. Print the Fibonacci series. Reference Materials string.This is just a small section to show how to add basic menus to your window. Usually you use a pre-made menu resource. This will be in an. This is rather compiler specific, commercial compilers will have a resource editor that you can use to create your menus, but for this example I will show the text of the. I usually have an. This file contains the identifiers for controls and menu items etc.
First the. Usually called "resource. The names and values here are up to you for the choosing. Now we write our. You also want to include "resource.
The easiest way to attach the menu and icon to your window is to specify them when you register the window class, like this: wc. Your window should now have a File and Stuff menu with the respective items underneath.
That is assuming your. If you hit Alt-Tab, the large version of the icon should be displayed in the application list. I've used LoadIcon to load the large icon because it's simpler, however it will only load icons at the default resolution of 32x32, so in order to load the smaller image, we need to use LoadImage. Be aware that icon files and resources can contain multiple images, and in this case the ones I've supplied contain the two sizes that I'm loading.
MFC Resource file notes. This is a bit more work programming wise, but adds flexibility and is sometimes necessary. You can also use icons that aren't stored as resources, you could choose to store your icon as a seperate file and load it at runtime. This would also give you the option of allowing the user to select an icon of their choice with the common dialogs discussed later, or something to that effect. A menu that is assigned to a window is automatically removed when the program terminates, so we don't need to worry about getting rid of it later.
If we did though, we could use GetMenu and DestroyMenu. The code for the icons is pretty simple, we call LoadImage twice, to load the icon as both a 16x16 size and a 32x32 size. We can't use LoadIcon at all because it will only load resources, not files. We specify NULL for the instance handle parameter because we aren't loading a resource from our module, and instead of a resource ID we pass in the name of the icon file we want to load.
NOTE: that the LoadImage calls will fail if the icon file isn't in the current working directory of the program. However if you run the program from the Debug or Release directories from explorer or the command shell, then you'll need to copy the icon file into that directory in order for the program to find it. Okay now that we have our menu, we need to make it do something.
Also we'll need to check which command we are getting and act accordingly. Now our WndProc should look something like this. We obviously want the Exit menu item to close the program. Windows Explorer simply displays the first icon numerically by ID in the program files resources, so since we only have one icon, that's what it is displaying.
If you want to be sure that a certain icon is displayed with your program file, simply add it as a resource and assign it a very low ID You don't even need to refer to the file in your program, and you can load completely different icons for your windows if you choose. All rights reserved.
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