input output stream

Question 1

What is the header of cin and cout

Answer 1

// 
#include

Question 2

How to display string of binary 10 digit value 7 in decimal

Answer 2

std: :bitset<10> value(7);
std: :cout «_space;value;

Question 3

What std function to read one line of string from input stream?

Answer 3

std::getline
Ex:
std::string input;
std::getline(cin, input);

Question 4

What is the simple way to read input data until end of file?

Answer 4

string input_data;
while ( !cin.eof() ) {
getline( cin, input_data);
}

Question 5

How to tell cout to display true or false instead of 0 or 1?

Answer 5

cout «_space;boolalpha;

Question 6

Show how to use stringstream for input stream.

Answer 6

#include 
...
stringstream sin( "123456\n"
                             "xxxyes\n"
                           )
string line;
getline(sin, line);

Question 7

How to display double in two decimal precision

Answer 7

cout «_space;std::fixed «_space;setprecision(2); «_space;value;