1,Write a short C++ code fragment that reads a line of text and echo the line with all uppercase letters replaced by asterisks.

2,Write a C ++program that prompts for an input file name and output file name, receives them in a C-string. The program should check for errors opening a file. Then write the contents of the input file in output file.

3,The dot operator is used between an object and a data member or between a calling object and a call to a member function from the class of the object.

4,A structure variable can be defined directly in the same statement that defines a structure definition.