Understanding pointers and local scope [duplicate]

Answer 1

Both ways of accessing the local variables of a method which goes out of scope is Undefined Behavior. These are some valid ways:

char* allocateMemory() 
{
    char* str= malloc(sizeof(char) * 20); //assuming C
    strcpy(str, "Hello World.");
    return str; //Valid 
}

const char* allocateMemory() 
{
    return "Hello world."; //Valid Hello World is in read only location
}

int* another()
{
    int *x = malloc(sizeof(int)); //assuming C
    *x = 5;
    return x; //Valid
}