c++ Printing the correct number of decimal points with cout

Question

I want to make a format for the output of some code and I cant reach it, I tried many combinations and still I get it right only for the first line, after that I quess I don't know how to "end the area" of setprecision, but maybe I am wrong.

Here is a simple code and the output that I want to achive:
https://code.sololearn.com/cJb8BpysxtST/#cpp

Maybe I'm doing something wrong or there is another function or manipulator that does what I want and I can't find it (yet).

Study reference:
http://www.cplusplus.com/reference/ios/

Answer 1

I am not sure what you wish to display as output.
You wish to use appropriate precision for elements a[i][0], but want a default precision of 4 for the rest.

So I have created a print function, to determine the input and format it accordingly.

I have tried doing something, and let me know it this is what you wished to get as the output, or if this worked for you:
https://code.sololearn.com/csvC2pbZYYzJ/#cpp

Answer 2

I have made some additions, and output is coming just like the one shown in the code - example for an output.

Answer 3

Welcome!
www.cplusplus.com is the best resource available. And, do complete their tutorial if you haven't...

Answer 4

Welcome ^_^ !

Answer 5

Really nice code :D but is not exactly what i want. The values have the correct number of decimal after the point, but i would really like to move the elements from the first column for a better appearance.

I mean i will try to explain it again, because i know is kinda odd output.

I can get your output or other types but not this one :)
The first column number 1(1.002) from the first line in on a position, under this position is number 4(1234), under 4 is number 1(1.03) from line 3.
Second column lets say is ok.
The third column is easy to set it "all to the right" with a bigger value for setw().

But the problem remanins for the first column.
I have changed the value of the element from the line 2 col 1 from 1111 into 1234 to make my idea more visible.

output should be something like this:
1.002 2 0.0004
1234 1113 60.0010
1.03 4 320.5002

i will put a link because in the SL text editor playground the char space is safer then the comment section: https://code.sololearn.com/cbxzo4IW6OhY/#cpp

I am still working on a solution, but i was sure what im looking for is already there somewhere and i dont know it.
Probably the easy way is something like setting the setw() based on the decimal point DOT"."

Thank you for the answer and again nice code :) i saw something in it that I like though and probably I will "steal" it hihi :)))

Answer 6

I think i found what i was looking for, i belive i should use flags :D i will read the documentation and i will come back with the code, if is the one :))

Answer 7

Yep :) you did it :D congrats! and thank you for the help.
Looks like i have to read more docs that i was aware of :)
You have some tips for a faster learning/reading?

Answer 8

Good point!
I was reading more from the reference section and not from tutorials...i dont know why.
Thank you again!