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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void add(int a[], int b[]) {
  5.     int carry = 0;
  6.     int maxLength = max(a[0], b[0]);
  7.     int sum[1000] = {0};
  8.     for (int i = 1; i <= maxLength; ++i) {
  9.         int digitA, digitB;
  10.         if (i <= a[0]) {
  11.             digitA = a[i];
  12.         } else {
  13.             digitA = 0;
  14.         }
  15.         if (i <= b[0]) {
  16.             digitB = b[i];
  17.         } else {
  18.             digitB = 0;
  19.         }
  20.         int sumDigits = digitA + digitB + carry;
  21.         a[i] = sumDigits % 10;
  22.         carry = sumDigits / 10;
  23.     }
  24.     if (carry > 0) {
  25.         a[maxLength + 1] = carry;
  26.         a[0] = maxLength + 1;
  27.     } else {
  28.         a[0] = maxLength;
  29.     }
  30. }
  31.  
  32. int main() {
  33.     int a[] = {5, 1, 2, 2, 5, 8};
  34.     int b[] = {6, 2, 2, 2, 6, 7, 8};
  35.     add(a, b);
  36.     for (int i = a[0]; i >= 1; --i) {
  37.         cout << a[i];
  38.     }
  39.     cout << endl;
  40.     return 0;
  41. }
  42.  
Success #stdin #stdout 0s 5264KB
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https://ideone.com/xWK1zU
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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