Question:
Write the definition of a function named fscopy that does a line-by-line copy from one stream to another. This function can be safely passed two fstream objects, one opened for reading, the other for writing. In addition, it gets a bool argument that is true if the output lines are to be numbered, and another argument, an int that specifies line-spacing in the output.
Assume that the input source is a text file consisting of a sequence of newline character-terminated lines. The function copies, line by line, the entire content of the data source associated with the first argument to the data target associated with the second argument. It returns the number of lines read in. If it the third parameter, the bool is true, every line that is output is preceded by a 6-position field holding the line number (an integer) followed by a space and then the actual line. If the last argument, the int is 2 or more, it specifies the line spacing: for example, it is 3, there are two blank lines output after each line printed. These blank lines are NOT numbered.
Answer:
void fscopy(fstream &fsin, fstream &fsout)
{
string s;
getline(fsin, s, '\n');
while (!fsin.fail( ) )
{
fsout << s << endl;
getline(fsin, s, '\n');
}
}
A differentiable function is continuous.
A relative maximum means that after the maximum the function starts to go down; then to reach a new maxium the function has to make a U-turn and start to go up. This U-turn point is a minimum
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Answer:
message confidentiality
Two or more hosts communicate securely, typically using encryption. The communication cannot be monitored (sniffed) by non trusted hosts. The communication between trusted parties is confidential.
message integrity
The message transported has not been tampered with or altered. A message has integrity when the payload sent is the same as the payload received.
Sending a message confidentially does not guarantee data integrity. Even when two nodes have authenticated each other, the integrity of a message could be compromised during the transmission of a message.
Yes, you can have integrity of a message without confidentiality. One can take a hash or sum of the message on both sides to compare. Often we share downloadable files and provide data integrity using md5 hash sums.
Explanation: