Manipulators, C++ what order should I use them in? - c++

Question

I am trying to learn about manipulators...is there a specific order for them?
For ex does std::setw come after or before std::setfill and should they be in separate lines?

Answer 1

There's no specific order, just make sure you include the <iomanip> library.
Example on your setw/setfil question:
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
cout << setw(10) << setfill('*');
cout << 123;
}

Answer 2

There is not specific order. But please note this, for example, if you want to use std::left and std::right, or write everything in one line then things can get bit tricky.
For example this will not print expected output (prints just: 7
):
std::cout << std::setw(10) << std::left << 7 << std::setfill('x') << std::endl;
Because you need to set attributes first, then print whatever you want. So all three lines below will work, no matter their places change (prints: xxxxxxxxx7):
std::cout << std::setw(10) << std::setfill('x') << std::right << 7 << std::endl;
std::cout << std::right << std::setw(10) << std::setfill('x') << 7 << std::endl;
std::cout << std::setfill('x') << std::right << std::setw(10) << 7 << std::endl;
And the code below is just to clarify things.
#include <iostream>
#include <iomanip>
int main()
{
std::cout << std::setw(15) << std::setfill('-') << "PRODUCT" << std::setw(15) << std::setfill('-') << "AMOUNT" << std::endl;
std::cout << std::setw(15) << std::setfill('-') << "Brush" << std::setw(15) << std::setfill('-') << 10 << std::endl;
std::cout << std::setw(15) << std::setfill('-') << "Paste" << std::setw(15) << std::setfill('-') << 8 << std::endl << std::endl;
std::cout << std::setw(15) << std::left << std::setfill('-') << "PRODUCT" << std::setw(15) << std::left << std::setfill('-') << "AMOUNT" << std::endl;
std::cout << std::setw(15) << std::left << std::setfill('-') << "Brush" << std::setw(15) << std::left << std::setfill('-') << 10 << std::endl;
std::cout << std::setw(15) << std::left << std::setfill('-') << "Paste" << std::setw(15) << std::left << std::setfill('-') << 8 << std::endl << std::endl;
std::cout << std::setw(15) << std::right << std::setfill('-') << "PRODUCT" << std::setw(15) << std::right << std::setfill('-') << "AMOUNT" << std::endl;
std::cout << std::setw(15) << std::right << std::setfill('-') << "Brush" << std::setw(15) << std::right << std::setfill('-') << 10 << std::endl;
std::cout << std::setw(15) << std::right << std::setfill('-') << "Paste" << std::setw(15) << std::right << std::setfill('-') << 8 << std::endl << std::endl;
return 0;
}