Set the value of double variable always with 3 digits decimal dot

Question

Hi everyone

In my code , user can input some numbers like :

2
7.2
8.444
9.728288

I want to set the values like this :

2.000
7.200
8.444
9.728

I want to set the value of double variables like that , not just print them . Because I want to work with them . Line Subtracting , multipluing and so on . In another words I don't want to assign these values to string variable . Because I can't work with them

Thanks

Answer 1

visph

It is not my answer . But i have gotten idea from that .

First i calculate with my numbers

when my work was complete , then I set the value to 3 digit . so the result value that printed , converted to String

Answer 2

printf("%.3f",num);

Answer 3

♨ Soumik 🎶

It is not true .

If the d variable was 6.1 , returns 6.1 .
Or if the d variable was 2 , returns 2.0 .

But I want to print 6.100 and 2.000 .

The answer is my description in answer 2

Thanks you ...