Type 'Int' has no subscript members

Question

I wrote a function:

  func rms16(buffer: Int, bufferSize: Int) -> Float
    {
        let sum: Float = 0.0
        let mySize: Int = bufferSize / sizeof(CShort)
        var buffer_short: Int = buffer
        for var i = 0; i < mySize; i++ {
           sum += buffer_short[i] * 2
        }
        let sqrt1: Float = sqrtf(sum / Float(mySize))
        return (sqrt1) / Float(mySize)
    }

Above function in a for loop it show me error like this: Type Int has no subscript members

Anyone tell me how can i fix it?

Answer 1

The buffer_short is an integer variable not an array of integer. You need to change the first argument of your function to an array of integer, like:

func rms16(buffer: [Int], bufferSize: Int) -> Float
{
    let sum: Float   = 0.0
    let mySize: Int  = bufferSize / sizeof(CShort)
    var buffer_short = buffer

    for var i = 0; i < mySize; i++
    {
       sum += buffer_short[i] * 2
    }
    let sqrt1: Float = sqrtf(sum / Float(mySize))
    return (sqrt1) / Float(mySize)
}