Computing teacher gave me homework to make a program which checks if a number is prime i wrote this:
it returns "its a prime" where is the problem????Code:int asal(int a,int b){ if(b=1){return 2;} else if(a%b!=0){return asal(a,b-1);} else if(a%b==0){return 1;}} int main(){ if(asal(27,26)==2){printf(" is a prime");} if(asal(27,26)==1){printf(" isn't a prime");} getchar(); return 0;}
Try adding a printf() to the beginning of asal() to show the value of a and b respectively.
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Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
Why does your function that checks for prime numbers require two inputs? That's just odd.
Quzah.
Hope is the first step on the road to disappointment.
Uh, your function returns either 1 or 2, both of which mean "true". Perhaps use 0 for false.
Code://try //{ if (a) do { f( b); } while(1); else do { f(!b); } while(1); //}
Nope. The problem is just "if (b==1)"
Also I guess it need not be called twice...hmm.
C programming resources:
GNU C Function and Macro Index -- glibc reference manual
The C Book -- nice online learner guide
Current ISO draft standard
CCAN -- new CPAN like open source library repository
3 (different) GNU debugger tutorials: #1 -- #2 -- #3
cpwiki -- our wiki on sourceforge
Another suggestion would be to work off existing code that specializes in figuring out/calculating prime numbers which will be the openssl source code package. If you are fond at reviewing source code this would be a good place to seek out how efficient code is written. A great learning tool IMHO.
It makes more sense to just type "prime" in the search box here, than it does to sort through the source code for openssl...
Quzah.
Hope is the first step on the road to disappointment.
