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zh:reference:language:ldexp [2015/10/09 02:11] – nzhu | reference:language:ldexp [2023/06/07 04:23] (当前版本) – 外部编辑 127.0.0.1 | ||
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+ | ====== ldexp() ====== | ||
+ | |||
+ | ===== 例子 ===== | ||
+ | <code cpp> | ||
+ | double c = ldexp(3, 2); // Sets c to 12 = 3 * 2 ^ 2 | ||
+ | double d = ldexp(2, 4); // Sets d to 32 = 2 * 2 ^ 4 | ||
+ | </ | ||
+ | ==== 描述 ==== | ||
+ | 计算x乘以2的exp次幂 ( x * ( 2^exp ) ) | ||
+ | |||
+ | ==== 语法 ==== | ||
+ | |||
+ | ldexp(x, exp) | ||
+ | === 参数 === | ||
+ | |||
+ | x double, float or int | ||
+ | |||
+ | exp double, float or int | ||
+ | |||
+ | 返回 double | ||