C/C++: 1.00000 <= 1.0f = False

Question

Can someone explain why 1.000000 <= 1.0f is false?

The code:

#include 
#include 

using namespace std;

int main(in         


        

Answer 1

The reason is that 1.0/10.0 = 0.1 can not be represented exactly in binary, just as 1.0/3.0 = 0.333.. can not be represented exactly in decimals. If we use

float step = 1.0f / 8;

for example, the result is as expected.

To avoid such problems, use a small offset as shown in the answer of mic_e.