free invalid pointer

1. Error Description: A node function that deletes a single-linked list has just been written, and the parameter is a pointer to a list of pointers and nodes in the linked list that specify the deletions. When I free the node to be deleted, the

"From MSDN && Encyclopedia"Prototype: void free (void *ptr);#include /#include deallocate spaces in memoryReleases the storage space that the PTR points to. The freed space is usually fed into the pool of available storage, which can then be

I recently wrote an SNMP program to implement the get operation of SNMP. After compiling and running the program, I reported an error in the title. I first searched for it online, many of them have the same error, probably because the pointer

C-Language pointer traps Category: C/cpp Transferred from: http://blog.csdn.net/porscheyin/article/details/3461670"C language Strange Bizarre, trap heavy, but has achieved great success!" The father of the--c

Procedure 1:Void mymalloc (char * s) // I want to allocate memory in the function and then return{S = (char *) malloc (100 );}Void main (){Char * P = NULL;Mymalloc (p); // here, P is actually null, and the value of P is not changed. Why?If (p) Free (

Author: JW. Zhou Date: 2014/7/2 1. NULL pointer (0/null) Returning null is equivalent to returning 0, because both null and 0 indicate null pointers. In other words, what is a null pointer is a pointer assigned 0, before initialization, the value is

Iv. array and pointer The C language provides two methods to access Arrays: pointer arithmetic and array subscript. The speed of pointer arithmetic can be higher than that of array subscript. Given the speed, programmers generally use pointers to

Overview Joel Spolsky believes that the understanding of pointers is an aptitude, which can be achieved without training. Even so, I 'd like to talk about the strongest and most error-prone elements in this C/C ++ language. In view of the

Description Joel Spolsky believes that the understanding of pointers is an aptitude, which can be achieved without training. Even so, I 'd like to talk about the strongest and most error-prone elements in this C/C ++ language. In view of the

Array and pointer of C ++ Primer version 4 Reading Notes (3), primer version 4 The C ++ language provides two low-level composite types similar to the vector and iterator types-arrays and pointers. Similar to the vector type, Arrays can also store a