Can I do a calculation using only the 2 numbers after decimal point in c++?

Question

Example:

I have a variable A that has a value of 5.123.

A * 2 = 10.246

I want calculate with only the 2 numbers after the decimal point (.12), like that:

A * 2 = 10.24

Is there any solution for this?

Answer 1

One option could be to truncate it:

value = (double) ((int)(value * 100))/100;

Here is a sample:

double valueOne = 2.34256;
cout<<valueOne<<endl;
double valueTwo = (double)((int)(valueOne*100))/100;
cout<<valueTwo<<endl;

Output:

2.34256
2.34