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Nov 8, 2018 · Type Smallest Positive Value Largest value Precision ==== ===== ===== ===== float 1.17549 x 10^-38 3.40282 x 10^38 6 digits double 2.22507 x 10^-308 1.79769 x 10^308 15 digits I dont know where the numbers in the columns Smallest Positive and Largest Value come from.
consider : int 32 bit and long long int of 64 bits. Yes, %(modulo) operator isn't work with floats and double.. if you want to do the modulo operation on large number you can check long long int(64bits) might this help you.
Jun 4, 2015 · The warning the compiler generates on the 2nd printf is: warning: format '%f' expects argument of type 'double', but argument 2 has type 'float *' [-Wformat=] this warning doesn't mean that is incorrect the conversion from int * to float *, but that printf expects a float value and not a pointer value. The compiler is only saying that the parameter is not of the same type that is declared in the format string.
bool areEqualRel(float a, float b, float epsilon) { return (fabs(a - b) <= epsilon * std::max(fabs(a), fabs(b))); } This is the most suitable solution for my needs. However I've wrote some tests and other comparison methods. I hope this will be useful for somebody. areEqualRel passes these tests, others don't.
Dec 2, 2011 · printf("%0k.yf" float_variable_name) Here k is the total number of characters you want to get printed. k = x + 1 + y (+ 1 for the dot) and float_variable_name is the float variable that you want to get printed. Suppose you want to print x digits before the decimal point and y digits after it.
Feb 6, 2018 · For some reason unknown to me, std::numeric_limits<float>:min() does not return the minimum float. Instead it returns the smallest positive float that is represented in normalized form. To get the minimum, use std::numeric_limits<float>::lowest(). I kid you not. Likewise for other floating point types, i.e. double and long double.
Oct 31, 2011 · Why one should not use function atof() to convert string to double? On success, atof() function returns the converted floating point number as a double value.
Aug 27, 2009 · Although "1.135" is "half-way" between 1.13 and 1.14, when converted to float, the value is 1.134999990463... and is no longer "half-way", but closer to 1.13 but incorrectly rounds to float of 1.139999985695... due to the more limited precision of float vs. double. This incorrect value may be viewed as correct, depending on coding goals.
Nov 15, 2012 · Assuming that you're talking about IEEE 754 float, which has a precision of 24 binary digits: represent the number in binary (exactly) and round the number to the 24th most significant digit. The result will be the closest floating point.
Jan 24, 2014 · This is part of an assignment, the program is supposed to receive either an 8 digit hexadecimal number that starts with '0x' or a floating point number, and using the computer's 'built in IEEE 754 capabilities' convert the number to hex or float. The code should be in C. My approach is the following. Store the input by the user as a string.
