1+ // 2021秋招-去哪儿网校招-笔试编程题
2+ // 以字符串的形式读入两个较大的数字,编写一个函数计算它们的和,以字符串形式返回。
3+ function add ( number1 , number2 ) {
4+ 5+ const longArr = [ ] , shortArr = [ ] ;
6+ if ( number1 . length > number2 . length ) {
7+ for ( const x of number1 ) longArr . push ( x )
8+ for ( const y of number2 ) shortArr . push ( y )
9+ } else {
10+ for ( const x of number1 ) shortArr . push ( x )
11+ for ( const y of number2 ) longArr . push ( y )
12+ }
13+ 14+ const max = longArr . length , min = shortArr . length ;
15+ let add10 = 0 , res = '' , num , num1 , num2 ;
16+ for ( let i = 0 ; i < max ; i ++ ) {
17+ if ( i < min ) {
18+ num1 = Number ( longArr [ longArr . length - i - 1 ] ) ;
19+ num2 = Number ( shortArr [ shortArr . length - i - 1 ] ) ;
20+ } else {
21+ num1 = Number ( longArr [ longArr . length - i - 1 ] ) ;
22+ num2 = 0 ;
23+ }
24+ num = num1 + num2 + add10 ;
25+ add10 = 0 ;
26+ if ( i !== max - 1 && num >= 10 ) {
27+ num = num - 10 ;
28+ add10 = 1 ;
29+ }
30+ res = num + res ;
31+ }
32+ return res ;
33+ }
34+ console . log ( add ( '589465849568' , '669784652318' ) ) ;
35+ console . log ( 589465849568 + 669784652318 ) ;
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