Why does making int* to float* conversions undefined behavior help ...

... integer types. There are annoying implicit conversions, discussions about undefined behavior on overflow (some think it's too much UB ...

how to convert float to unsigned int - Post.Byes - Bytes

You can't convert a float to an int. An int has no decimal portion so part of your float value gets lost. Your compiler will warn you about this.

Summary of C/C++ integer rules - Project Nayuki

When arithmetic is performed on a signed integer type, overflow is undefined behavior. UB can produce correct, inconsistent, and/or incorrect ...

Common Visual C++ ARM Migration Issues - Microsoft Learn

Floating-point conversion can only be relied on if you know that the value is within the range of the integer type that it's being converted to.

INT36-C. Converting a pointer to integer - Confluence

Do not convert a pointer type to an integer type if the result cannot be represented in the integer type. (See undefined behavior 24.) The mapping between ...

Improving Application Security with UndefinedBehaviorSanitizer ...

These errors occur because C/C++ evaluates many integer expressions as an int, which is signed and generally 32 bit in size. For example, if "j" ...

floats, bits, and constant expressions – hbr

You can't access the bits of a float via a typecast pointer [which is undefined behavior, and covered by 5.20.2.5]:. 1. 2. 3. 4. constexpr ...

4. Type Conversions - C in a Nutshell [Book] - O'Reilly

To convert a real floating-point number to an unsigned or signed integer type, the compiler discards the fractional part. If the remaining integer portion is ...

How to convert a char array to float? - C++ Forum - CPlusPlus

https://stackoverflow.com/questions/9867883/is-left-shifting-a-signed-integer-undefined-behavior-in-c03. Anyway, not sure if this will help ...

What Every C Programmer Should Know About Undefined Behavior ...

Signed integer overflow: If arithmetic on an 'int' type (for example) overflows, the result is undefined. One example is that "INT_MAX+1" is not ...

Converting INT to float problem and sprintf issue for float type data ...

This is an example of signed integer overflow, which is undefined behavior. ... I think sprintf does not support FLOAT conversion... sprintf the float ...

[C/C++] Surprises and Undefined Behavior From Unsigned Integer ...

You can see the provided link for the precise integer promotion rules, but in practice, the rules mean that during a math operation or ...

GCC Undefined Behavior Sanitizer - ubsan - Red Hat Developer

Even a conversion of a floating-point value to an integer value can overflow. Such a case is not diagnosed by default, but can be enabled ...

Save bytes in float variable - Programming Questions - Arduino Forum

You convert a bit pattern twice into a float pattern. The right hand side is constructed from bytes and thus is treated like an integral value ...

Floating-Point Determinism | Random ASCII - WordPress.com

Again, undefined behavior for int or float, but actual failures are more likely with floats. ... integer, which is a whole other set of problems.

weird behaviour with abs() - C Board

It sees that you are trying to pass a double, and "helpfully" converts it to an integer automatically for you. There is nothing strange or ...

Lecture 08 | CS 131 Spring 2023 - GitHub Pages

... does not support it. ... do what you want, its behavior is never undefined ... Type conversions are typically used to convert between primitives (e.g. float and int) ...

conversions to int/double/etc... - DaniWeb

>It does have one problem in that it does not detect integer overflow. Undefined behavior is far from this benign. Not only does atoi fail to ...

C++ NaN not consistent with integer types - Developer Community

N4700 7.10 [conv.fpint]/1 “A prvalue of a floating-point type can be converted to a prvalue of an integer type. The conversion truncates; that ...

Understanding and Preventing Overflow (I Had Too Much to Add ...

... behavior of overflow with signed integer math is undefined. To would ... behavior, doesn't make it the correct behavior for an application program ...