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feat: 完成测试2 #254

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21 changes: 19 additions & 2 deletions lib/add.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,22 @@
function add() {
// 实现该函数
// 843529812342341234
// 236124361425345435
function add(a, b) {
const maxLength = Math.max(a.length, b.length)

a = a.padStart(maxLength , 0);
b = b.padStart(maxLength, 0);
let sum = 0;
let c = 0;
let ret = "";
for(let i=maxLength-1 ; i>=0 ; i--){
sum = parseInt(a[i]) + parseInt(b[i]) + c;
c = Math.floor(sum/10);
ret = sum%10 + ret;
}
if(c == 1){
ret = "1" + ret;
}
return ret;
}

module.exports = add
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