The reason it's called a double is because the number of bytes used to store it is double the number of a float (but this includes both the exponent and significand). The IEEE 754 standard …

而double大约能精确到小数点后面的15位左右。 具体精确到几位，跟所用的编译器有关，但是各个编辑器编译器之间，也是相差不大的。 至于整数部分，float表示的整数部分的范围，就已经够 …

Dec 31, 2021 · Type double, 64 bits long, has a bigger range (*10^+/-308) and 15 digits precision. Type long double is nominally 80 bits, though a given compiler/OS pairing may store it as 12 …

Nov 24, 2019 · double(*)[5] 是指向 double[5] 类型的指针类型。 double** 是指向 double* 类型的指针类型。 区别不是很显然的吗？ double[5] 类型能隐式转换成 double* 类型，但它们不是同一 …

The term double precision is something of a misnomer because the precision is not really double. The word double derives from the fact that a double-precision number uses twice as many bits …

Feb 16, 2009 · A double is a floating point type, not fixed point. Do not use std::fixed as that fails to print small double as anything but 0.000...000. For large double, it prints many digits, …

Jun 12, 2011 · A double is an IEEE754 double-precision floating point number, similar to a float but with a larger range and precision. IEEE754 single precision numbers have 32 bits (1 sign, 8 …

Jul 2, 2009 · There are three floating point types: float, double, and long double. The type double provides at least as much precision as float, and the type long double provides at least as …

Format %lf is a perfectly correct printf format for double, exactly as you used it. There's nothing wrong with your code. There's nothing wrong with your code. Format %lf in printf was not …

Jul 20, 2009 · This is an unusual case, likely outside OP's concern. When double is encoded as a pair of a floating points to achieve desired range/precession, (see double-double) there exist a …