LinuxQuestions.org - Of pointers - seg faults, memory leaks and assorted troubles

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Of pointers - seg faults, memory leaks and assorted troubles

As I understand it, this code would lead to a segfault in Linux and probably unexpected behaviour in OSes where there is no concept of "protected memory". Am I right?

Code:

char *str; /* Don't initialize the pointer - it is initialized to some random memory location */ 

strcpy (str, "something is the problem"); /* Assign the pointer */

Now this code:

Code:

void func1 ()

{

  char *str = new char[50];

  func2 (str);

  strcpy (str, "Something else");

}



void func2 (char* value)

{

  delete[] value; /* delete is called on a pointer that's got as a parameter */

}

This would also lead to unexpected or dangerous consequences, right?

Or a classic memory leak scenario:

Code:

int* array = new int[100];

...

...

int* newarray = new int[10];

array = newarray; /* the old array is lost */

Can you think of any more situations where pointers would lead to memory leaks or other complex, hard to resolve problems?

Ask your instructor?

DECLARATION:

I don't have one (an instructor). I'm not asking for homework help. I left school about 8 years ago. I'm a hobbyist programmer. I love dabbling with C/C++. I'm not a school kid. I'm doing my MBA now. I just want to discuss pointers and their intricacies in different compilers with fellow C/C++ programmers out of academic curiosity.

/END DECLARATION

You have missed the obvious one.

Code:

void func()

{

int* a = new int;

}

Smart pointers help avoid these problems.