Variables declared and used locally inside a function definition are destroyed, once a return value is passed back to a calling statement. This approach of passing by value to a function has an advantage that programmer does not have to a free a memory allocated by function's local variables and variables passed to a function cannot be changes. Disadvantage comes when declared variables within a function scope are needed to be used by other functions without creating an overhead be copying these variables via function's return value.One solution to this problem is to create global variables. However, this always leads to decreased code readability, efficiency and bugs, therefore, declaring global variables should be avoided whenever possible. Declared global variables within a global namespace are holding an allocated memory during the entire program runtime and very often are needed only for a short time.Imagine that a programmer will be able to dynamically allocate a memory during a program runtime . This memory allocation can also be used anywhere within a code and freed any time is no longer needed. This is where the so called “Free Store” comes in. Free store is a memory available for a programmer to be dynamically allocated and de-allocated during the program execution.
C++
Topic: Pointers
Allocating a memory from the "Free Store" ?
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When local variable’s name is same as member’s name
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