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- c语言中float、double的区别和用法？ - 知乎
C语言中，float和double都属于 浮点数。区别在于：double所表示的范围，整数部分范围大于float，小数部分，精度也高于float。 举个例子： 圆周率 3 1415926535 这个数字，如果用float来表示，最多只能精确到小数点后面的6位。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
- What is the difference between float and double? - Stack Overflow
I've read about the difference between double precision and single precision However, in most cases, float and double seem to be interchangeable, i e using one or the other does not seem to affec
- C语言中，double**和double (*) [5]有什么区别？怎么理解？ - 知乎
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，但它们不是同一类型。 可以考虑一下 short 和 long 这两种类型是能相互隐式转换的，但它们显然没有因此变成同一类型。
- Whats the difference between a single precision and double precision . . .
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 as a regular floating-point number For example, if a single-precision number requires 32 bits, its double-precision counterpart will be 64 bits long
- How can I escape double quotes in a string? - Stack Overflow
A similar question for C C++ (as this may be the top search engine hit): How can I get double quotes into a string literal?
- How do I print a double value with full precision using cout?
In my earlier question I was printing a double using cout that got rounded when I wasn't expecting it How can I make cout print a double using full precision?
- What exactly does Double mean in java? - Stack Overflow
A Double in Java is the class version of the double basic type - you can use doubles but, if you want to do something with them that requires them to be an object (such as put them in a collection), you'll need to box them up in a Double object
- What are the actual min max values for float and double (C++)
For double, this is 2 1024 −2 971, approximately 1 79769•10 308 std::numeric_limits<T>::min() is the smallest positive normal value Floating-point formats often have an interval where the exponent cannot get any smaller, but the significand (fraction portion of the number) is allowed to get smaller until it reaches zero
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