How do you define decimals in the C programming language?

In C language, decimals can be defined by declaring floating point variables. Floating point variables are divided into single precision floats (float) and double precision floats (double). The general syntax for defining decimals is as follows:

float 变量名;         // 声明一个单精度浮点型变量
double 变量名;        // 声明一个双精度浮点型变量

float 变量名 = 值;    // 声明并初始化一个单精度浮点型变量
double 变量名 = 值;   // 声明并初始化一个双精度浮点型变量

For example, to define a variable named pi and assign it a value of 3.14, you can write it like this:

float pi;           // 声明一个单精度浮点型变量
pi = 3.14;          // 赋值给变量pi

Alternatively, you can initialize it directly when declaring.

float pi = 3.14;    // 声明并初始化一个单精度浮点型变量