大数求和
javascript
function largeNumberAdd(a, b) {
let maxLength = Math.max(a.length, b.length);
a = a.padStart(maxLength, "0");
b = b.padStart(maxLength, "0");
let carryNumber = 0;
let result = "";
for (let i = maxLength - 1; i >= 0; i--) {
const sum = Number(a[i]) + Number(b[i]) + carryNumber;
carryNumber = Math.floor(sum / 10);
result = (sum % 10) + result;
}
return carryNumber ? 1 + result : result;
}
const a = "111";
const b = "10000000000000000000";
// test
console.log(largeNumberAdd(a, b));
// 10000000000000000111
function largeNumberAdd(a, b) {
let maxLength = Math.max(a.length, b.length);
a = a.padStart(maxLength, "0");
b = b.padStart(maxLength, "0");
let carryNumber = 0;
let result = "";
for (let i = maxLength - 1; i >= 0; i--) {
const sum = Number(a[i]) + Number(b[i]) + carryNumber;
carryNumber = Math.floor(sum / 10);
result = (sum % 10) + result;
}
return carryNumber ? 1 + result : result;
}
const a = "111";
const b = "10000000000000000000";
// test
console.log(largeNumberAdd(a, b));
// 10000000000000000111