Question

i have read that some machine can’t express exaclty floating point number for example 1.1
let’s take code

float x=0.1;
do{

x+=0.1;
printf("%f\n",x);
} while(x!=1.1); 

this code never finished how can i make that code finish? maybe convert it to double or?

Answer 1

In this case, checking “<” will do the trick:

float x=0.1;
do{

x+=0.1;
printf("%f\n",x);
} while(x<1.05); 

In general, you should test against an “epsilon”. Look here for further information.