(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:
<code class="c">(double) 表达式;</code>
Among them, expression can be any valid C language expression.
Function:
(double) The conversion operator is used for the following purposes:
Example:
<code class="c">int x = 10; double y = (double) x; // 将整数 x 转换为双精度浮点数 y</code>
<code class="c">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</code>
<code class="c">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</code>
(double) Conversion operators are particularly useful in the following situations:
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