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phcbestV2EX 第 578198 号会员，加入于 2022-04-14 10:24:40 +08:00 |
phcbest 最近回复了
164 天前 回复了 maojun 创建的主题 › 程序员 › 请问没接触过安卓开发的后端开发要怎么学习 Kotlin Compose Multiplatform |
我感觉 Compose 和 KMP 完全不是一个东西，学 KMP 不如直接上 flutter 了，Compose 纯原生开发提效很爽
191 天前 回复了 glaz 创建的主题 › Android › 谁知道如何恢复相册授权时“仅部分授权”的选项 |
APP 没适配 A14 特性，一般引入了下面这个权限的都是主动适配了的
<uses-permission android:name="android.permission.READ_MEDIA_VISUAL_USER_SELECTED" />
<uses-permission android:name="android.permission.READ_MEDIA_VISUAL_USER_SELECTED" />
2023-06-11 22:48:32 +08:00 回复了 ellermister 创建的主题 › 程序员 › 能否用你所熟悉的开发语言，实现基础四则运算？ |
```kotlin
fun add(a: Int, b: Int): Int {
var carry: Int
var sum: Int
do {
sum = a xor b
carry = (a and b) shl 1
a = sum
b = carry
} while (b != 0)
return a
}
fun subtract(a: Int, b: Int): Int {
return add(a, add(b.inv(), 1))
}
fun multiply(a: Int, b: Int): Int {
var result = 0
var shift = 0
var bCopy = b
while (bCopy != 0) {
if (bCopy and 1 == 1) {
result = add(result, a shl shift)
}
shift++
bCopy = bCopy shr 1
}
return result
}
fun divide(a: Int, b: Int): Int {
var dividend = a
var divisor = b
var quotient = 0
while (dividend >= divisor) {
dividend = subtract(dividend, divisor)
quotient = add(quotient, 1)
}
return quotient
}
```
fun add(a: Int, b: Int): Int {
var carry: Int
var sum: Int
do {
sum = a xor b
carry = (a and b) shl 1
a = sum
b = carry
} while (b != 0)
return a
}
fun subtract(a: Int, b: Int): Int {
return add(a, add(b.inv(), 1))
}
fun multiply(a: Int, b: Int): Int {
var result = 0
var shift = 0
var bCopy = b
while (bCopy != 0) {
if (bCopy and 1 == 1) {
result = add(result, a shl shift)
}
shift++
bCopy = bCopy shr 1
}
return result
}
fun divide(a: Int, b: Int): Int {
var dividend = a
var divisor = b
var quotient = 0
while (dividend >= divisor) {
dividend = subtract(dividend, divisor)
quotient = add(quotient, 1)
}
return quotient
}
```
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