SOURCE

// function keepTwoXiaoshu(num) {
//     str = num+''

//     if(!(str.includes('.'))) {
//         val = str+'.00'
//     }else {
//       len = str.split('.')[1].length

//       while(len<2) {
//           str+='0'
//           len+=1
//       }

//       if(len>2) {
//           alert('金额请保持两位小数')
//           return ''
//       }     
//       val = str
//     }
// }

let C1_APPLY_SUM = 11
let C1_LAST_YEARS_INCOME = 22.2
let C1_FIXED_ASSETS = 111.111

let money_arr = [C1_APPLY_SUM,C1_LAST_YEARS_INCOME,C1_FIXED_ASSETS]

function keepTwo(money_arr) {
    for(let i = 0 ;i<=money_arr.length; i++ ) {
        let str =  money_arr[i] + ''
        if(!str.includes('.')) {
            str = str += '.00'
        }else {

        let len = str.split('.')[1].length
         while(len<2) {
          str+='0'
          len+=1
        }

         if(len>2) {
          alert('金额请保持两位小数')
       }     
    
    }
 }
}
keepTwo(money_arr)

console.log(money_arr)