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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. int stringmax(string A, string B) {
  7.     if(A.length() < B.length()) return B.length();
  8.     return A.length();
  9. }
  10.  
  11. string add(string A, string B) {
  12.     int max = stringmax(A, B);
  13.     int alen = A.length();
  14.     int blen = B.length();
  15.     for(int i=0;i<max-alen;i++) A = '0' + A;
  16.     for(int i=0;i<max-blen;i++) B = '0' + B;
  17.     string result = A;
  18.     for(int i=max - 1;i>=0;i--) {
  19.         int K = (int)(result[i] + B[i]) - 96;
  20.         result[i] = (char)(K % 10 + 48);
  21.         if(K > 9) {
  22.             if(i != 0) {
  23.                 result[i-1] += K / 10;
  24.             } else {
  25.                 result = (char)(K / 10 + 48) + result;
  26.             }
  27.         }
  28.     }
  29.     return result;
  30. }
  31.  
  32. int main() {
  33. 	cout << add("99999", "1");
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 15240KB
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Standard input is empty
stdout
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100000
https://ideone.com/evk4gx
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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