1. Swift报错: Swift Compiler Error Binary oprator '+' cannot be applied to operands of type 'UInt16' and 'UInt8'

错误写法:

let a:UInt16 = 1_000

let b: UInt8 =1

let sum = a + b

println(@H_502_33@"sum = \@H_502_33@(sum@H_502_33@)")

正确写法:

let a:UInt16 = 1_000

let b: UInt8 =1

let sum = a + UInt16(b)

println(@H_502_33@"sum = \@H_502_33@(sum@H_502_33@)")

2. Swift报错: Swift Compiler Error Binary oprator '+' cannot be applied to operands of type 'Int' and 'Double'

错误写法:

let a = 123

let b = 0.456

let sum = a + b

println(@H_502_33@"sum = \@H_502_33@(sum@H_502_33@)")

正确写法: