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  1. #include<iostream>
  2. #include<string>
  3. #include<map>
  4.  
  5.  
  6.  
  7. int main() {
  8.     int x, ans, unk;
  9.     char sign;
  10.     std::string s, cmnd;
  11.     std::map<std::string, int> namtonum;
  12.     std::map<int, std::string> numtonam;
  13.     while(std::cin>>cmnd){
  14.         if(cmnd == "def"){
  15.             s.clear();
  16.             std::cin>>s>>x;
  17.             if(namtonum.count(s))namtonum.erase(s); /*если слово уже определено - удаляем его*/
  18.             if(numtonam.count(x))numtonam.erase(x); /*аналогично поступаем с числом*/
  19.             namtonum[s] = x; numtonam[x] = s;
  20.         }
  21.         else if(cmnd == "calc"){
  22.             ans = 0; unk = 0; sign = '+'; /*в ans будем записывать значение выражения.*/
  23.             while(sign != '='){
  24.                 s.clear(); 
  25.                 std::cin>>s;
  26.                 while(s == "+" || s == "-"){/*костыль на случай если первым идёт + или -*/
  27.                     if(s == "+")std::cin>>s;
  28.                     if(s == "-"){sign = '-'; std::cout<<s; std::cin>>s;}
  29.                 }
  30.                 if(namtonum.count(s)){
  31.                     if(sign == '-')ans -= namtonum[s];
  32.                     else ans += namtonum[s];
  33.                 }
  34.                 else unk = 1; /*если unk == 1 то на выходе "unknown"*/
  35.                 std::cin>>sign;
  36.                 std::cout<<s<<" "<<sign<<' ';
  37.             }
  38.             if(numtonam.count(ans) && unk == 0)
  39.                 std::cout<<numtonam[ans]<<'\n';
  40.             else printf("unknown\n");
  41.         }
  42.         else if(cmnd == "clear"){namtonum.clear(); numtonam.clear();}
  43.         cmnd.clear();
  44.     }
  45. }
Success #stdin #stdout 0s 4544KB
comments (?)
stdin
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def foo 3
calc foo + bar =
def bar 7
def programming 10
calc foo + bar =
def is 4
def fun 8
calc programming - is + fun =
def fun 1
calc programming - is + fun =
clear
stdout
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foo + bar = unknown
foo + bar = programming
programming - is + fun = unknown
programming - is + fun = bar
https://ideone.com/KVWt7L
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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