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  1. //This code using C++ 
  2. //Code is for who just starting up or already knowing a bit about C++
  3. //This code is used to add, subtract, multiply, divide large numbers like 1e100 or 1e1000
  4. //Code by @banhratlangon (Find me in Discord)
  5. //Enjoy the code :D
  6.  
  7. #include <bits/stdc++.h>
  8.  
  9. using namespace std;
  10.  
  11. string tostring(long long n)
  12. {
  13. 	string s = "";
  14. 	while(n != 0)
  15. 	{
  16. 		s += (char) (n % 10 + 48);
  17. 		n /= 10;
  18. 	}
  19. 	return s;
  20. }
  21.  
  22. bool ss(string a, string b)
  23. {
  24.     while(a[0] == '0') a.erase(0, 1);
  25.     while(b[0] == '0') b.erase(0, 1);
  26.     if(a.size() < b.size()) return true;
  27.     if(a.size() > b.size()) return false;
  28.     if(a < b) return true;
  29.     return false;
  30. }
  31.  
  32. string cong(string a, string b)
  33. {
  34.     string c = "";
  35.     int nho = 0;
  36.     while(a.size() < b.size()) a = '0' + a;
  37.     while(a.size() > b.size()) b = '0' + b;
  38.     int n = a.size();
  39.     for(int i = n - 1; i >= 0; i--)
  40.     {
  41.         int x = a[i] + b[i] - 96 + nho;
  42.         nho = x / 10;
  43.         x %= 10;
  44.         c = (char) (x + '0') + c;
  45.     }
  46.     if(nho > 0) c = '1' + c;
  47.     return c;
  48. }
  49.  
  50. string tru(string a, string b)
  51. {
  52.     bool am = false;
  53.     string c = "";
  54.     int nho = 0;
  55.     if(ss(a, b))
  56.     {
  57.         string d = a;
  58.         a = b;
  59.         b = d;
  60.         am = true;
  61.     }
  62.     while(a.size() > b.size()) b = '0' + b;
  63.     int n = a.size();
  64.     for(int i = n - 1; i >= 0; i--)
  65.     {
  66.         int x = a[i] - b[i] - nho;
  67.         if(x < 0)
  68.         {
  69.             x += 10;
  70.             nho = 1;
  71.         }
  72.         else nho = 0;
  73.         c = (char) (x + '0') + c;
  74.     }
  75.     while(c[0] == '0') c.erase(0, 1);
  76.     if(am) c = '-' + c;
  77.     return c;
  78. }
  79.  
  80. string nhan1cs(string a, int b)
  81. {
  82.     string c = "";
  83.     int n = a.size(), nho = 0;
  84.     for(int i = n - 1; i >= 0; i--)
  85.     {
  86.         int x = (a[i] - 48) * b + nho;
  87.         nho = x / 10;
  88.         x %= 10;
  89.         c = (char) (x + 48) + c;
  90.     }
  91.     if(nho > 0) c = (char)(nho + 48) + c;
  92.     return c;
  93. }
  94.  
  95. string nhan(string a, string b)
  96. {
  97.     string c = "";
  98.     int n = b.size(), hang = 0;
  99.     for(int i = n - 1; i >= 0; i--)
  100.     {
  101.         string x = nhan1cs(a, b[i] - 48);
  102.         hang++;
  103.         for(int i = 0; i < hang; i++) x += '0';
  104.         c = cong(c, x);
  105.     }
  106.     c.erase(c.size() - 1, 1);
  107.     return c;
  108. }
  109.  
  110. string chia(string a, long long b)
  111. {
  112.     string c = "";
  113.     int n = a.size(), x;
  114.     long long so = 0;
  115.     for(int i = 0; i < n; i++)
  116.     {
  117.         so = 10 * so + (a[i] - 48);
  118.         x = so / b;
  119.         so %= b;
  120.         c += (char) (x + 48);
  121.     }
  122.     while(c[0] == '0') c.erase(0, 1);
  123.     return c;
  124. }
  125.  
  126.  
  127.  
  128. int main()
  129. {
  130.     long long d;
  131.     string a, b;
  132.     cout << "Remember that if you use devide or modulo, the second number\n";
  133.     cout << "input must be under or equal to 1e18.\n";
  134.     cout << "Type + or - or * or / or % to start caculation (% is modulo).\n";
  135.     char cha;
  136.     cin >> cha;
  137. 	if(cha != '+' && cha != '-' && cha != '*' && cha != '/' && cha != '%')
  138.     {
  139.     	cout << "Try again.\n";
  140.     	return 0;
  141.     }
  142.     if(cha == '+')
  143.     {
  144.         cin >> a >> b;
  145.         cout << cong(a, b);
  146.     }
  147.     else if(cha == '-')
  148.     {
  149.         cin >> a >> b;
  150.         cout << tru(a, b);
  151.     }
  152.     else if(cha == '*')
  153.     {
  154.         cin >> a >> b;
  155.         cout << nhan(a, b);
  156.     }
  157.     else if(cha == '/')
  158.     {
  159.         cin >> a >> d;
  160.         cout << chia(a, d);
  161.     }
  162.     else
  163.     {
  164.         cin >> a >> d;
  165.     	string g = tostring(d);
  166.     	cout << tru(a, nhan(chia(a, d), g));
  167.     }
  168. }
  169.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
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1234
4321
stdout
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Remember that if you use devide or modulo, the second number
input must be under or equal to 1e18.
Type + or - or * or / or % to start caculation (% is modulo).
-3087
https://ideone.com/AejOkF
This code is used to add, subtract, multiply, divide large numbers like 1e100 or 1e1000
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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