Very simple for someone who knows C++. Please answer all of them T or F? (1/2(do
ID: 3882722 • Letter: V
Question
Very simple for someone who knows C++. Please answer all of them
T or F? (1/2(double) 1/2) (1/21/ (double) 2) T or F? (1.0/2(double) 1/2) &&(1.0/21/2.0) Use the stream manipulators setw() and endl to display the integer number x right-justified in a 5- character, blank-filled field on a line all by itself: that is, mimic the C programming language format specifier "%5d ". Use the stream manipulators setw (), fixed, and setprecision () to display the double- precision number x right-justified in a 10-character, blank-filled field with 3 places after the decimal point: that is, mimic the C programming language format specifier "%10 3f". Fact Each of the 4 expression-statements below produces 3 side effects -2 side effects change the value of i and the 3rd side effect is the output of i to the standard output stream cout. Notes (I) There is a comma operator after each w = 1 expression: and (2) the comma operator is left-to-right associative. T or F? The 4 expression statements display the same value.Explanation / Answer
Answers:
23. False
24. True
25.
#include <iostream>
#include <iomanip>
int main(void)
{
std::cout << std::right << std::setw(5) << x << std::endl;
return 0;
}
26.
#include <iostream> // std::cout, std::fixed
#include <iomanip>
int main()
{
std::cout << std::fixed <<std::setw(10);
std ::cout<<std::setprecision(3)<<std::right<<x;
return 0;
}
27. False, They do not produce the same values. For the 4 statements. The value of I output will be 2,1,2,1
28. True , they all increase the value of i.
29. False. Postfix has a greater precedence than prefix.
30. thisIsAVeryExtremelyLongIdentfier+=12345678;
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