Question

if char c2='a' , c3='A', c4;
c4=c2-c3;
printf("the difference between capital letters and small letters is:%d\n",(int)c4); ... what is the effect of putting int before c4 ??

Answer 1

You might want to look up "casting" in your C book.

Answer 2

it will print the ascci code not the letters itself

Answer 3

right ?

Answer 4

it should

Answer 5

should what ! , why don't any one here easily write the answer or just say i don't know !!

Answer 6

OS is not here to provide you answers, OS is here to help you learn and garner the answer for yourself.

Answer 7

it should print the ascii code, but i am not sure...try to run the code.

i agree with @eSpeX

Answer 8

sir i have just started learning the c language self learning and the comp. in not working & it's just a little new thing in a very very long code , and i just want to check if it right or not , and of course if the compilar had been working i wouldn't have the pleasure of asking you :)

Answer 9

ok 1st of all relax :P i am not an expert also..actually my skills go back to 7-8 years ago...plus do not have the compiler...trying to write as java and run it :) give some time :)

ps not a sir :P

Answer 10

haha my skills go for a week ago :)

Answer 11

try rerunning but initialize c4 as int ,not char.
tell me if it helps

Answer 12

char c2='a',c3='A';
int c4;
//c4= 'a'-'A';

c4= (int)c2 -(int)c3;
System.out.println(c4);

something like this

(this is java code)

Answer 13

another question please , would you please tell me the logical order of the opertators . is that order right () */% +- <=>= == != && || += -= /= *= ?

Answer 14

Before you spend a great deal of time on this, what are you trying to accomplish?

Answer 15

the value for 8/10*9%10 =10 ?

Answer 16

http://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B
for the operators

Answer 17

i try to find the diff between visual basic language and c alnguage

Answer 18

sir , micro , you made my day

Answer 19

There are a great many differences between C and basic. Are you trying to accomplish a specific task with the OP code?

Answer 20

but i am asking for the priority

Answer 21

no just learnig what i need to learn

Answer 22

Your precedence is http://www.isthe.com/chongo/tech/comp/c/c-precedence.html

Answer 23

any parenthesis to know the order or like u wrote it?

Answer 24

Well trying to do mathematical operations on chars is not a very effective way to learn. I would suggest you start with a goal and work toward that end.

Answer 25

snx sir

Answer 26

no just i wrote it , is the order right ?

Answer 27

the value for 8/10*9%10 =0

Answer 28

What you wrote will first divide 8 by 10, then multiply it by 9, then modulus the result with 10, which should not give you a remainder of 10.

Answer 29

the link for precedence @eSpeX gave you is great and easy to read. try recalculating the exsample you gave us so you can see why it is 0 and not 10.

Answer 30

sry i was suppose to write 0 :D

Answer 31

it will be 10*9=90 then 8/90 for int value zero then reminder of 0 %10 is zerp :D

Answer 32

yes :D

Answer 33

while i am writing a code is there any diff between ++b and b++

Answer 34

yes the precedence in which they increment. sec ill find a good link for you

Answer 35

look at this part of code

Answer 36

int main()
{int i=3;
int j=9;
int k=2;
int m,n,o;
m= ++i %k+j;
printf("i=%d\nj=%d\n k=%d m=%d\n",i,j,k,m);

n=j%i+m-- ;
printf("i=%d\nj=%d\nk=%d\nn=%d\n",i,j,k,n);
k+=8;
printf("i=%d\nj=%d\nk=%d\n",i,j,k );

o=n/k*m%k;
printf("i=%d\nj=%d\nk=%d\no=%d",i,j,k,o);


getch () ;
return 0; }

Answer 37

http://stackoverflow.com/questions/24853/what-is-the-difference-between-i-and-i

Answer 38

it asks me in a problem to do such so , but i it keep saying that i=4 while i give it 3 to him , is that a generousness from c langiage :D

Answer 39

++i well it is being incremented so yes it should be 4.

Answer 40

ahm , so when i write m=++i it= m=i+1 ?

Answer 41

yes

Answer 42

ahh and if i write i=9 , and m=i-- it gives me i=8 but m = 9

Answer 43

yes
that is because i-- will decrement the value of i, but return the pre-decremented value.

Answer 44

check the link i previously sent you

Answer 45

i got it

Answer 46

you made my day thank you , a 8 hours of studying ending by a person like you . is just great :)

Answer 47

heh very kind of you saying this :) good luck with your studies :) i am studying myself (java)

Answer 48

my college mate has just ending study it , if you want anything he would like to help you ofc :)

Answer 49

thank you . very nice of him :)

Answer 50

You may want to take a look at http://www.softintegration.com . They have a good C/C++ interpreter which would be perfect for this type of experiment.

Answer 51

snx alot @rsmith6559