Function using enumerated values and arrays in C

[ab12]

I want this function (which is a part of a larger program) to read a bunch of letters (they will all be different letters) and assign the index of that letter in the array to carry the value TRUE. there are two arrays i want to do this do: set_A and set_B.
actually, i made an enumeration type earlier in the program which defines all lowercase letters as type letters. it was necessary that i use the enum type.
This is not working properly at all. It compiles but doesnt do what i want it to. i think the main problem is in the bold parts.

void getArray(bool set_A[],bool set_B[])
{
     letters let;
     for (let=a; let<=z; let++)
     {
         set_A[let]=FALSE;
         set_B[let]=FALSE;
     }
     printf("Enter the string of letters for Set A: ");
	 [B]while((let=getchar()) != EOF)
	 {
         set_A[let]=TRUE;
         }[/B]
     printf("\nEnter the string of letters for Set B: ");
	 [B]while(( let=getchar()) != EOF)
	 {
        set_B[let]=TRUE;
         }[/B]
}

[Savage]

Why does it need to be a enumeration?
Have you defined EOF too?

Does it run infinitely inside the while loop?
If not,what is the output you are getting?

PS:Please be more descriptive when posting questions. Our posting guidelines are of great help there.

[ab12]

No, it doesn't run infinitely. rather, i input the string of letters and then i press ENTER and nothing happens. i thought i would use EOF so when i pressed ENTER i could stop the input. i have to use enumeration types because that is a requirement for this assignment.
what i want is the following: for example if i input 'acde' for set_A, i first want let=a so set_A[a]=TRUE, and then let=c so set_A[c]=TRUE and so on.

[ab12]

Why does it need to be a enumeration?
Have you defined EOF too?

Does it run infinitely inside the while loop?
If not,what is the output you are getting?

PS:Please be more descriptive when posting questions. Our posting guidelines are of great help there.

No, it doesn't run infinitely. rather, i input the string of letters and then i press ENTER and nothing happens. i thought i would use EOF so when i pressed ENTER i could stop the input. i have to use enumeration types because that is a requirement for this assignment.
what i want is the following: for example if i input 'acde' for set_A, i first want let=a so set_A[a]=TRUE, and then let=c so set_A[c]=TRUE and so on.

[weaknessforcats]

If you inout an A you get 65. I assume then, that you set the bool in element 65 to true? Yes? So your array must be 96 to catch any character you can enter

You see, from inside a function you can't tell the number of elements in an array. Due to decay of array, you don't even know there is an array.

If you have a 26 element array for letters only and you enter A and you want the first element (which is element 0) of the array to be true, then you have to convert the A (a 65) to 0 using an algorithm that will convert B (66) to 1. Then the algorithm shoud also conver a (97) to 0 likewise. If you see what I mean.

[ab12]

If you inout an A you get 65. I assume then, that you set the bool in element 65 to true? Yes? So your array must be 96 to catch any character you can enter

You see, from inside a function you can't tell the number of elements in an array. Due to decay of array, you don't even know there is an array.

If you have a 26 element array for letters only and you enter A and you want the first element (which is element 0) of the array to be true, then you have to convert the A (a 65) to 0 using an algorithm that will convert B (66) to 1. Then the algorithm shoud also conver a (97) to 0 likewise. If you see what I mean.

Thanks i got it to work. to make things simpler, i also changed the EOF to '\n' so i can just hit the RETURN key to end the input

[weaknessforcats]

Glad to be of help.

Be sure to let us know if you get stuck again.