long string add.

/* this code can add two 50 digit number that mean 100000000000000000000009991 + 1088888888888214124 */
//Just increase the array length size//
#include <iostream>
#include <string>
using namespace std;
int getnum(char c_num){
  int res = c_num - '0';
  return res;
}
void print_array(int *arr,int len){
  for(int i = 0;i<len;i++){
    cout << arr[i] << "  ";
  }
  cout << endl;
  return;
}
int find_small(int a,int b){
  if(a < b) return a;
  return b;
}
int main(){
  int first_arr,sec_arr;
  cout << "First Array Len:";cin >> first_arr;
  cout << "Second Array Len:";cin >> sec_arr;
  cout << "Enter Your First Array:";char a_arr[10],b_arr[10];
  cin >> a_arr;
  cout << "Enter your Second Array:";
  cin >> b_arr;
  int a[10],b[10],sum[20];
  for(int i = 0;i<first_arr;i++){
    a[i] = getnum(a_arr[i]);
  }
  for(int i = 0;i< sec_arr;i++){
    b[i] = getnum(b_arr[i]);
  }
  cout << "int arr_a = ";print_array(a,first_arr);cout << "\n\n";
  cout << "int arr_b = ";print_array(b,sec_arr);cout << "\n\n";
  int g ,flag = 0,sm;
  if(first_arr == sec_arr){
    g = first_arr;
    flag = 1;
  }
  else if (first_arr > sec_arr ){
    g = first_arr;
  }
  else g = sec_arr;
  sm = find_small(first_arr,sec_arr);
  int j,k,r,c,s,q,temp;
  for(j = first_arr-1, k = sec_arr-1,r=0;g > 0;j--,k--,r++,g--,sm--){
    cout << "a[i] = " << a[j] <<"b[i] = " << b[k] << "sm = " << sm;
    if(sm > 0){
        s = a[j] + b[k];
    } else{
      s = a[j];
    }
    cout << " s = " << s;
    cout << " j = " << j << " k = " << k << " r = " << r << " greatest = " << g<<endl;
    if (s > 9){
      q = s%10;temp = s/10;
      a[j-1] = a[j-1] + temp;
      sum[r] = q;
      if (g == 1){sum[++r] = temp;}
    }
    else sum[r] = s;
  }
  print_array(sum,r);
  cout << "Rev === == \n\n";
  /*Rev THE ARRAY*/
  for(int i = r-1;i >= 0;i--){
    cout << sum[i];
  }
  //
  cout << endl;
}

/*output */
1.give the first array length big or equal to the second array length.
2.dont forget to increase the array size of the code.
3.contactthedead1998@gmail.com //=> if you want me to modify the code