Segmentation fault when casting int to char in C -


i have simple c program. in main, have operation:

int main(){   int thenumber = 9009;   printf("%s", (char *)thenumber); }

and when run it, gives me seg fault. idea why? doing wrong?

expected output

this code should convert thenumber string , print it. output be:

9009

actual output

a segmentation fault.

this trying print whatever found @ address 9009. seeing operating system not giving program access address (it being used else entirely) operating system raises segmentation fault. read more here: what segmentation fault?

if wanted print value of integer use correct printf command:

int main(){   int thenumber = 9009;   printf("%d", thenumber); }

note don't need introduce string here achieve this.


Comments

Post a Comment

Popular posts from this blog

javascript - RequestAnimationFrame not working when exiting fullscreen switching space on Safari -

request animation frame stops working when exiting fullscreen clicking on original space's safari window. fine if fullscreen mode canceled escape key or calling cancelfullscreen(). steps reproduce: open https://dl.dropboxusercontent.com/u/769042/prezi/safari-fullscreen.html click "draw raf", kittie appears click "fullscreen", go fullscreen click "draw raf", kittie appears go space original safari was, showing "click exit fullscreen mode", click anywhere, out fullscreen click "draw raf", nothing happens what handling click calling: window.requestanimationframe(draw); which draws on canvas context: function draw() { ctx.drawimage(img, math.random()*500|0, math.random()*400|0, 100, 100); } i checked .hidden , .visibilitystate, updated correctly. tested on osx 10.9.3, safari 7.0.4 (9537.76.4). has workaround/solution other switching old settimeout? this sounds webkit bug 88940 : using reque...
Read more

Python ctypes access violation with const pointer arguments -

i have api i'm trying wrap in python (2.7.6 on win7) code using ctypes. here's api: client_dllfunc bool clientapi search_exporttoclipcopy(clienthsearch handle, int channel, lpctstr filename, const time_t& from, const time_t& to, const bool* cameras, int length, bool usepassword, lpctstr password, bool includetextin = false, bool excludeplayer = false); the issue i'm having cameras argument; , i've had issue other const pointer arguments well. here's how i'm wrapping api: def search_exporttoclipcopy(self, hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, password, includetextin=true, excludeplayer=false): exporttoclipcopy = self.sdkdll.search_exporttoclipcopy exporttoclipcopy.argtypes = [c_int, c_int, c_wchar_p, c_long, c_long, pointer(c_bool), c_int, c_bool, c_wchar_p, c_bool, c_bool] exporttoclipcopy.restype = c_bool exporttoclipcopy(hsearch, csearch, filename, tfrom, tto, cameras, length, usepassword, pass...
Read more

jquery - Keeping Kendo Datepicker in min/max range -

when user types type in date outside of range, we're trying ensure date gets changed closest min/max. text displayed in date picker not change though thought script changing value() @(html.kendo() .datepickerfor(x => x.dob) .max(new datetime(datetime.now.addyears(-18).year, datetime.now.addyears(-18).month, datetime.now.addyears(-18).day)) .min(new datetime(datetime.now.addyears(-70).year, datetime.now.addyears(-70).month, datetime.now.addyears(-70).day)) .events(e=>e.change("ondobchange")) .htmlattributes(new { required = "required", ng_model = "model.dob" })) <p ng-show="validatestate.submitted && frmmain.dob.$invalid" class="help-block">please select</p> <script> function ondobchange(e) { var d...
Read more