automatic storage

• exists till the function ends.** -> only useable in the scope
• automatic variable is variable used in function.
• allocated in stack -> last-in, first-out ## example in automatic storage

int main()
{
    char temp[42]; // this is automatic variable
    return (0);
}

static storage

• exists till program ends.
• allocated in data

example in static storage

int main()
{
    static char temp[42]; // this is static variable
    return (0);
}

dynamic storage

• exits till delete is called.
• new and delete operators manage memory poll (a.k.a free store)
• allocated in heap
• depend to programmer.
  • WATCH MEMORY LEAKS
    • recommend : locate new and delete close.

example in dymaic storage

int main()
{
    int *ptr = new int(42);
    delete ptr;
    return (0);
}

reference

• https://hackthedeveloper.com/memory-layout-c-program/
• C++ Primer Puls sixth edition(Stephen Prata)