How to use decimal numbers

Question

I need to use decimals but the code doesn't accept them

Answer 1

Attention! Float/Double is not the same. Fix point numbers (like Decimal) can represent every number in their decimal places, floating points (float, double) can't.

Example: 0.2 is not representable with float!

Experimental prove: try to add 1.000 times 0.2 and print out the result.

Manuel Dall'Olio
Standard C++
std::decimal::decimal32, std::decimal::decimal64, and std::decimal::decimal128

Of course you can use others (like BOOST), or write your own datatype.

Answer 2

#include <decimal>

using namespace std;
using namespace std::decimal;

int main()
{
decimal32 d = 4.7df;
// your code
}

Answer 3

C++

Answer 4

Well no, I hadn't even thought about it. I will try that

Answer 5

I am a beginner so, please, be patient. How can I incorporate std::decimal::decimal 32 into my code?

Answer 6

Aaaah ok thanks