Searching link list recursiverly in c -

-

I'm new to data structures I've written a simple program to search for an integer in a link list function It is believed to bring the pointer back to the relevant position, but when it is called in the main () it can be empty (or just waste) (printf message is inserted for diagnosis.)

Link list: 

  structure list {int data; Structure list * link; };

Search function: 

  struct list * search_list (struct list * head_ptr, int x) {printf ( "\ nfunc looking head addr: 0x% x ", Head_ptr); If (head_ptr == NULL) {printf ("got tap. \ N"); Return tap; } And if (head_prit-> data == x) {printf ("retaining element: 0x% x", head_ptr); Return head_ptr; } Else {printf ("not found, next"); Search_list (head_ptr-> link, x); }}

Call inside the main: 

  tmp_list_ptr = list_head_ptr; Tmp_list_ptr = search_list (list_head_ptr, 15); If (tmp_list_ptr == NULL) printf ("main: not found: 0x% x \ n", tmp_list_ptr); Other printf ("main: found: 0x% x \ n", tmp_list_ptr);

return 0;

The program output: 

  [0X1dd33250: 19,] [0X1dd33230: 18,] [0X1dd33210: 17,] [0X1dd331f0: 16,] [0X1dd331d0: 15,] [0X1dd331b0: 14,] [0X1dd33190: 13,] [0X1dd33170: 12,] [0X1dd33150: 11,] [0X1dd33130: 1,] [0X1dd33110: 2,] [0X1dd330f0: 3,] [0X1dd330d0: 4,] [0X1dd330b0 : 5,] [0X1dd33090: 6,] [0X1dd33070: 7,] [0X1dd33050: 8,] [0X1dd33030: 9,] [0X1dd33010: 10,] to search for 15. function looking head addr: 0X1dd33250 not found, the next event Search head addr: 0X1dd33230 not found, the function searches head addr: 0X1dd33210 not found, the function searches head addr: 0X1dd331f0 not found, the function searches head addr: 0X1dd331d0 element found Retaining: 0X1dd331d0 key was not found: 0X0

I have reasons to return mainly back? could you help me please? Note: Taken from Example: Algorithm Design Manual, Steven S. Skiana, 2nd Edition

Your recursive calls search_list () should actually be the result of return instead, your function is calling search_list () recursively and then indirectly removes your return value Throw

It should have generated a compiler warning, such that "control reaches the end of non zero function."

Depending on the architecture of your computer, The results can end with this, this is what we see as "undefined behavior"! For example, on 32-bit Intel processors, the return value of the function is stored in the eax register. How to use the processor's registers based on the program set by the compiler, your function will have returned the results of any other computation.


Comments

Post a Comment

Popular posts from this blog

Pass DB Connection parameters to a Kettle a.k.a PDI table Input step dynamically from Excel -

-
Image
I have a requirement whenever I run my own kettle, dynamically took database connection parameters from an excel source Every run should go. I have an Excel column names: hostname, username, database, password. I want to pass these connection parameters to my table input stage dynamically whenever it runs the job. This is what I was trying to do. You can get it Connection parameters from the DB reading source (for example Excel or a CSV file in my example) < / Li> Store the parameters in the variable Using the variable in your connection's settings. Setting Variables Create another conversion for (you can not do it in the same conversion Uses): set variables element variable: The element that reads / writes your data creates a new connection and sets the connection parameter using $ {variable name_} Note that you will need to type in the field field in the field $ {password} Also keep in mind that this can be a security problem as the
Read more

multithreading - PhantomJS-Node in a for Loop -

-
I am trying to implement a screen-scraps application that opens a URL in which a parameter changes as it is for a loop: var data = [ '100', '101', '102', '103', '104']; (Var indexA = 0; indexA & lt; data.length; indexA ++) for {Phantom Generation ({'port': freeport}, function (pH) {ph.create page (function (page) {page.open ("http: //...++ data [index B] +" ... " , Status {console.log ("open site:" + data [index B], position); / * OLD * / indexB ++; page evaluation (function () {// page scrape and an object Return}, function {console.log (result.dataRequest); // here is the problem}); / * new and fixed * / indexB ++} first console Logs it: Open Site: 100 Success Opens Site: 101 Success B Ola Site: 102 Success Opening Site: 103 Success Opened Site: 104 Success Which is good. Data is verified in scrap HTML and from index to array Matches. So in page 101 I scrap '101 and retrieve' and pu
Read more

c++ - MATLAB .m file to .mex file using Matlab Compiler -

-
I know that it can speak as a very famous topic, but something that helps me with it Not found This scenario is: I have my functions function, no matter what's inside, it's a generic function that may depend on other toolboxes. Does. Has input and output; I want to generate the same myFun.mex function; : Lib myFun This way I get some new files: libmyfun.c libmyfun.dll Libmyfun.exp libmyfun.exports libmyfun .h libmyfun.lib Reading around and I think that Creating a myfun.cpp that is very famous is included: / * gateway function * / zero max function (ent NLHS, MXARRA * PLS [], int NRHS, CONST M Xeray * PHS []) Here is the Variable Deals * / / * code here * /} I have tried to do this and are called Regular of Max Generation: Max ('- v', 'myfun.cpp') But I get many errors, and I should say that my myfun.cpp copy / Paste Function is where I have a lot of doubts ... especially on input / output management. My q
Read more