题目:
题解:
Go
func addStrings(num1 string, num2 string) string {
add := 0
ans := ""
for i, j := len(num1) - 1, len(num2) - 1; i >= 0 || j >= 0 || add != 0; i, j = i - 1, j - 1 {
var x, y int
if i >= 0 {
x = int(num1[i] - '0')
}
if j >= 0 {
y = int(num2[j] - '0')
}
result := x + y + add
ans = strconv.Itoa(result%10) + ans
add = result / 10
}
return ans
}