c - program.exe stops working after compiling? -

-

i trying write code obtain patch/sub_window of array. wrote following code:

#include <stdio.h>  int patch(int a[5][5],int b[2][2],int r,int s) {  int i=0,j=0,k;  if(r<=(5-2) && s<=(5-2)){      for(r;r<(r+2);r++){         for(s;s<(s+2);s++)         {             k = a[r][s];             b[i][j] = k;              = i+1;             j = j+1;          }     } } else {printf("error!");}  return 0; }   int main() { int i,j,p,q; int y[2][2] = {0};  int x[5][5] = {{95,155,200,200,232}, {100,155,232,95,150}, {200,45,200,135,123}, {232,150,85,69,180}, {95,95,200,123,45} };  for(i=0;i<5;i++){     for(j=0;j<5;j++){         patch(x,y,i,j);         for(p=0;p<2;p++){             for(q=0;q<2;q++)             {                 printf("y[%d][%d] = %d\n",p,q,y[p][q]);              }         }     } }   return 0; }

however, once run , compile code error stating program.exe has stopped working. how can fix ? need use dynamic memory allocation kind of process? or there simpler solution.

this line:

for(r;r<(r+2);r++)

will run lot longer intend, causing buffer overflow. think mean save r+2 before starting loop, , compare against that.

also, increment i , j 4 times, access out bounds of b too. need re-think loop logic. perhaps should be:

for (i = 0 ; < 2; i++)     (j = 0; j < 2; j++)      {         b[i][j] = a[r+i][s+j];     }

Comments

Post a Comment

Popular posts from this blog

c# - Unity IoC Lifetime per HttpRequest for UserStore -

-
i'm trying clean default implementation of accountcontroller.cs comes out of box in new mvc5/owin security implementation. have modified constructor this: private usermanager<applicationuser> usermanager; public accountcontroller(usermanager<applicationuser> usermanager) { this.usermanager = usermanager; } also, have created lifetime manager unity looks this: public class httpcontextlifetimemanager<t> : lifetimemanager, idisposable { private httpcontextbase _context = null; public httpcontextlifetimemanager() { _context = new httpcontextwrapper(httpcontext.current); } public httpcontextlifetimemanager(httpcontextbase context) { if (context == null) throw new argumentnullexception("context"); _context = context; } public void dispose() { this.removevalue(); } public override object get...
Read more

Change the color of an oval at click in Java AWT -

-
i have draw ovals in java, , @ click change color. beginning tried change color after 20 ms, doesn't work. my code is: public class mycomponentnew extends frame { public graphics2d g2d; public mycomponentnew(string title) { super(title); setsize(400, 550); } @override public void paint(graphics g) { this.g2d = (graphics2d) g; this.g2d.setcolor(color.red); this.g2d.filloval(10, 55, 50, 100); } public void changecolor () { this.g2d.setcolor(color.blue); this.g2d.filloval(10, 55, 50, 100); } } and in class main method have: mycomponentnew m; m = new mycomponentnew("fereastra cu baloane"); m.setvisible(true); m.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent we) { system.exit(0); } }); try { thread.sleep(20); } catch(interruptedexception e) {} m.changecolor(); the color of oval remains red. ...
Read more

I am trying to solve the error message 'incompatible ranks 0 and 1 in assignment' in a fortran 95 program. -

-
i writing program in fortran find velocity of parachuting person in relation time. keep getting error can't fix. new programming , appreciated. the error is v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) 1 error: incompatible ranks 0 , 1 in assignment @ (1) and program is program para integer :: real :: v(11) !velocity real :: q !initial velocity real :: h !time step real :: c !drag coefficient real :: m !mass ! gravity equal 32 ft/s^2 write (*,*)'enter time step' read(*,*)h write(*,*)'enter initial velocity' read(*,*)q write(*,*)'enter drag coefficient' read(*,*)c write(*,*)'enter mass' read(*,*)m i=1,10 ! 1 10, 1 being interval. end v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) q=v(1) end program you cannot use [] normal parenthesis in expressions. array constructor, [ items ] means array items elements. end do should after line.
Read more