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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
- 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。
- c - float vs. double precision - Stack Overflow
The 53 bits of double s give about 16 digits of precision The 24 bits of float s give about 7 digits of precision
- c++ - Double precision - decimal places - Stack Overflow
From what I have read, a value of data type double has an approximate precision of 15 decimal places However, when I use a number whose decimal representation repeats, such as 1 0 7 0, I find tha
- Qual a forma correta de usar os tipos float, double e decimal?
float e double são mais rápidos, eficientes e econômicos do que os BigDecimal s do Java; não posso afirmar muito sobre o Decimal do C#, mas creio que para multiplicação seja muito mais leve Normalmente, nos processadores mais modernos, existe um núcleo de processamento de aritmética de ponto flutuante
- decimal vs double! - Which one should I use and when?
When should I use double instead of decimal? has some similar and more in depth answers Using double instead of decimal for monetary applications is a micro-optimization - that's the simplest way I look at it
- Correct format specifier for double in printf - Stack Overflow
Your variant is as correct as it ever gets %lf is the correct format specifier for double But it became so in C99 Before that one had to use %f
- 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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