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Asked: 2026-06-06T09:07:55+00:00

I have a Client program by tcp connection that send data to a server.

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I have a Client program by tcp connection that send data to a server.
In client I need send a normalized decimal number to server for normalization I Multiplier decimal number to 100,000 then send it to server but I get wrong number in server.
for example.

double price;

I set it from Gui to 74.40

cout<<price; ---> 74.40

and when I serial my object I send

#define Normal 100000
int tmp = price*Normal;
oDest<<tmp;

In wireshrk I see that client sent 7439999.

why this happened? how I can pervent this problem?

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1 Answer

  1. Editorial Team

    Don’t store anything as a floating point value. Use a rational number instead, or use a fixed point value. Floating point values (like double) basically “cheat” in order to fix a large range of possible values into a reasonable chunk of memory, and they have to make compromises in order to do so.

    If you are storing a financial value, consider storing pennies or cents or whatever is the smallest denomination.

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