double是什么意思英语c语言？
编辑：自学文库
时间：2024年03月09日
In C language, "double" is a data type that represents double-precision floating-point numbers. It is used to store decimal numbers with a larger range and better precision compared to the "float" data type. The "double" data type occupies 8 bytes of memory and can store values from approximately 1.7E-308 to 1.7E+308. It provides about 15 decimal digits of precision. The "double" data type is especially useful when dealing with financial calculations, scientific calculations, or any application that requires high accuracy in decimal calculations. It can handle a wider range of values and provides better precision, making it suitable for calculations that involve fractions or very large or very small numbers.In C language, when declaring a variable of type "double", we use the keyword "double" followed by the variable name. For example:double pi = 3.14159;double average = (1.5 + 2.8) / 2;In these examples, pi and average are variables of type "double" that store decimal numbers.To perform arithmetic operations on "double" variables, we can use operators like +, -, *, and /. We can also use functions from the math library, such as sqrt() or pow(), to perform more complex calculations involving "double" variables.Overall, the "double" data type in C language allows more precise and accurate calculations involving decimal numbers, making it an essential tool in various applications.