What is the meaning of the two parts specified between parentheses in a range-based for loop, separated by a colon?

Which STL class is the best fit for implementing a collection of data that is always ordered so that the pop operation always gets the greatest of the elements? Suppose you are interested only in push and pop operations.

What is the meaning of the three sections specified between parentheses in a for loop separated by semicolons?

What is true about the variable named ptr? void *ptr;

What is the output of this code? int c=3; char d='A'; std::printf("c is %d and d is %c",c,d);

What is the output of this code? printf("1/2 = %f",(float)(1/2));

Thinking about data members and addressable memory, how are a struct, class and union different?

What is the data type for the following: L'Hello World'?

Which class(es) can be used to perform both input and output on files in C++?

Which rules apply to operator overloading in C++?

In C++, what is the difference between these two declarations: void foo(); void foo(void);