Now that we have covered the variables and data types it becomes possible to introduce operators. Operators are special symbols that are used to represent and direct simple computations, this is significative importance in programming, since they serve to define, in a very direct...
l What is variable address, name, value? l What is a pointer? l How is a pointer declared? l What are address-of and dereference operators? l How can a pointer be
To de-allocate dynamic memory, we use the delete operator.
Dynamic Memory Allocation. We can dynamically allocate storage space while the program is running, but we cannot create new variable names "on the fly".
To allocate a single variable dynamically, we use the scalar (non-array) form of the new operator
It is accomplished by two functions (in C) and two operators (in C++): malloc and free, new and
When you use dynamic allocation, all the created variables are stored into heap, Heap memory is not managed automatically.
? members can be accessed using pointers: (*obp).setd(5); ? parentheses around (*obp) are needed because dot-operator has higher priority than dereferencing.
Dynamic variables are not declared with ordinary variable declarations; they are explicitly allocated and deallocated at run time. Memory allocation is accomplished using the new operator and deallocation is accomplished using the delete operator.
You can allocate memory at run time within the heap for the variable of a given type using a special operator in C++ which returns the address of the space allocated.