Usage of (double) in c language

(double) is the conversion operator in C language used to convert values ​​to double-precision floating-point types. It is used to convert integers or characters to double-precision floating-point numbers and to convert lower-precision floating-point numbers. is a double-precision floating-point number, and in arithmetic operations ensures that the result is a double-precision floating-point number.

Usage of (double) in C language

(double) is C language Conversion operator for converting a value to a double-precision floating-point type. It coerces the value of an expression to type double, even if the expression was not originally of type double.

Usage:

(double) 表达式;

Among them, expression can be any valid C language expression.

Function:

(double) The conversion operator is used for the following purposes:

• Convert an integer or character to a double-precision floating point number
• Convert a smaller precision floating point number to a double precision floating point number
• Ensure the result is a double precision floating point number during arithmetic operations

Example:

int x = 10;
double y = (double) x;  // 将整数 x 转换为双精度浮点数 y

float f = 3.14;
double d = (double) f;  // 将单精度浮点数 f 转换为双精度浮点数 d

int a = 10, b = 20;
double avg = (a + b) / 2.0;  // 使用 (double) 确保结果为双精度浮点数

(double) Conversion operators are particularly useful in the following situations:

• When you need to mix numbers of different precisions
• When you need to ensure the accuracy of arithmetic operations
• When you need to store large amounts of data in double-precision floating point numbers

The above is the detailed content of Usage of (double) in c language. For more information, please follow other related articles on the PHP Chinese website!