Round the float number

Question

Hi everyone.
I have some problems. This is my code
double n=90.005;
cout<< setprecision(2)<<fixed<<n;
I want output is 90.01 but the code run and give me the answer is 90.00
But when I try 90.006 output is 90.01. I don't understand why.
Can someone show me how to solve this problem????

Answer 1

Correct output for your example is 90.00

Answer 2

you may visit this thread
https://stackoverflow.com/questions/12349323/setting-the-precision-of-a-double-without-using-stream-ios-baseprecision