编辑代码

function printK(imgPx){
    let imgPxs = imgPx.split(" ")
    let minK
    let sum = 0
    imgPxs.map((item)=>{
        sum = sum + Number(item)
    })
    let ks = 128-(sum/imgPxs.length)
    if((ks+"").indexOf('.')>-1){
         let beforeNumber = ks.toFixed(0)
         let nextNumber = Number(beforeNumber)+1
         let beforeValue = (sum+(imgPxs.length*beforeNumber))/imgPxs.length-128
         let nextValue = (sum+(imgPxs.length*nextNumber))/imgPxs.length-128
        if(beforeValue<nextValue){
            minK = beforeNumber
        }else if(beforeValue === nextValue){
            minK = beforeNumber
        }else{
             minK = nextValue
        }
    }else{
        minK = ks
    }
    console.log(minK)

}
// printK("0 0 0 0")
printK("129 130 129 130")