Question

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Floating point error in representation?

I have problem with this code

int cent;
int dollar ;
float cnt2dlr;
 //convert cnt to doloar ;
cnt2dlr=(cnt)/(100);

The problem is when cnt = 175, cnt2dlr = 0.17,444444 and not 0.17,5

Any help?

Answer 1

Floating point numbers are not exact representations. They are approximations, so you cannot guarantee much precision. Read What Every Computer Scientist Should Know About Floating-Point Arithmetic

To increase the precision of the numbers, consider using a 64-bit double instead of a 32-bit float.