Menu
When a variable is declared compiler automatically allocates memory for it. This is known as compile time memory allocation or static memory allocation. Memory can be allocated for data variables after the program begins execution. This mechanism is known as runtime memory allocation or dynamic memory allocation.
As soon as a pointer is passed to free() , the object it pointed to reaches the end of its lifetime. Any attempt to refer to the pointed-to object has undefined behavior (i.e., you're no longer allowed to dereference the pointer).
C realloc() method “realloc” or “re-allocation” method in C is used to dynamically change the memory allocation of a previously allocated memory. In other words, if the memory previously allocated with the help of malloc or calloc is insufficient, realloc can be used to dynamically re-allocate memory.
I know we should free any variable allocated with malloc, but what if I return it in a function? Something like this:
char *somefunction(int somearg){
char *str;
str=(char *)malloc(sizeof(char *));
//some code
return str;
}
Should I free str? How could I do that?
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With