Create A Menu Using A Switch Statement | C Programming Example

Example of creating a menu using a switch statement in C. Source code: github.com/portfoliocourses/c.... Check out www.portfoliocourses.com to build a portfolio that will impress employers!

[@lordrodrig]

I was 2 days trapped in this and you came here with this video and save me thank you !

[@PortfolioCourses]

I'm so glad to hear this helped you out! :-)

[@naboulsikhalid7763]

Hi, very thankful to your generosity, I have no word. THANK YOU

[@PortfolioCourses]

You're very welcome Naboulsi, thank you for your support! :-)

[@Eduardo-iz4lo]

Much Thanks, helped for my homework

[@Eduardo-iz4lo]

I am runnning in to errors, my code is not return up to the while so it can ask for my choice again

[@ilovekyries05]

hey im 1 year late but i was wondering why you had to include ' int choice = 0' at the start instead of just int choice since choice was going to be a stored value

[@rheamaebumanglag8809]

What should I do if I clicked the wrong button, and I want to repeat the process again. What code should I use or add in the program?

[@PortfolioCourses]

That's a good question, I think I would try to give the user an option to "go back" after selecting a different option. So for example entering a deposit amount of -1 to go back, as in this below (modified) code for that case:
case 1:
printf("Enter Amount (-1 to go back): ");
scanf("%lf", &amount);
if (amount != -1) balance += amount;
break;

[@janing2800]

but how to write a condition that won't accept an entered amount in withdraw option if it will make the balance a negative number?

[@PortfolioCourses]

We could use an if-statement or maybe a do-while loop and if-statement inside the withdraw case, for example this video goes over using a do-while loop for input validation: ua-cam.com/video/IDIJXsZRqP4/v-deo.html

[@runyuyu1426]

is there a way to stay on one option and require the user to input control to return to the menu page?

[@PortfolioCourses]

Great question! :-) Yes, we could create a similar loop below the "case" that we want the user to stay in, and only stop that loop once the user enters some particular value.

[@azwanazman5115]

why if I use exit(0), it says the exit was not declared? and how to exit from the switch, cause I want to ask whether the user wants to go the menu back or exit the program

[@PortfolioCourses]

You need to include the stdlib.h library at the top of the file for exit to work, as it is defined in that library. The code for the problem is here: github.com/portfoliocourses/c-example-code/blob/main/switch_menu.c. And here is some documentation of the exit function being in the stdlib.h library: www.tutorialspoint.com/c_standard_library/stdlib_h.htm.

[@azwanazman5115]

@@PortfolioCourses thank you vary much : )

[@mashalmokarar4817]

Awesome

[@PortfolioCourses]

Thank you Mashal! :-)

[@ilyassilyass9608]

What does the while(true) means or does?

[@PortfolioCourses]

Great question! :-) So a while loop will run so long as the condition is true, so for example:
int x = 0;
while (x < 5)
{
x++;
}
will run so long as the condition "x < 5" is true. Given that we increment x in the loop body with x++, the loop condition will eventually be false.
But with "while (true)" we have a loop with the *condition* "true". This means the condition will NEVER be false, it will always be true because it's literally just the expression "true". So this type of loop will execute "forever" unless we use the break keyword in the loop body which breaks control flow out of the loop. See this video on the break keyword: ua-cam.com/video/02ZCvvC2GME/v-deo.html.

[@ilyassilyass9608]

@@PortfolioCourses thank you

[@PortfolioCourses]

@@ilyassilyass9608 You're welcome! 🙂

[@Username92381]

While (true) basically means suicide

[@Meiyourenn]

is there anyway you can do this but with these choices?
Enter 3 grades
Show average (with the 3 grades) and letter grade
Show highest grade
Show lowest grade
Exit