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lavos/cap3/ex9.go

28 lines
736 B

package cap3
// Ex9t1 整数拆解为2的幂之和(返回整数的二进制bit取值情况,bit的idx对应相应的幂)
func Ex9t1(num int) []bool {
// 传进来的是int,一般是32bit,这里就用64来存bit,肯定够了
bits := make([]bool, 0, 64)
for i := 0; num != 0; i++ {
bits = append(bits, num%2 == 1)
num /= 2
}
return bits
}
// Ex9t2 整数拆解为2的幂之和(返回幂取值)
func Ex9t2(num int) []uint8 {
// 传进来的是int,一般是32bit,这里就用64来存bit,肯定够了
bits := make([]uint8, 0, 64)
for i := uint8(0); num != 0; i++ {
if num%2 == 1 {
bits = append(bits, i)
}
num /= 2
}
return bits
}