Stuff

#include <iostream>#include <string>#include <sstream>using namespace std;template <typename Iterator> string F1(Iterator begin, Iterator end){ Iterator i,i1; float a; if ((i = find(begin,end,'(')) != end) { return F1(i+1,end); }else if ((i = find(begin,end,')')) != end) {        a = F(begin,i);        ostringstream ss;        ss << a;        string str = ss.str();        i1 = erase(begin,i);        insert(i1,str.begin(),str.end());        return str;  } }  template <typename Iterator> float F(Iterator begin, Iterator end){      Iterator i; if ((i = find(begin,end,'+')) != end) { return F(begin,i) + F(i+1,end) ; }else if ((i = find(begin,end,'-')) != end) { return F(begin,i) - F(i+1,end) ; }else if ((i = find(begin,end,'*')) != end) { return F(begin,i) * F(i+1,end) ; }else if ((i = find(begin,end,'/')) != end) { return F(begin,i) / F(i+1,end) ;   }else { string str1(begin,end) ;               istringstream stream(str1);               float i;               stream >> i;               return  i ;                     }}int main() {    string str,str1;    float a;    getline(cin,str);    str1 = F1(str.begin(),str.end());    //a = F(str.begin(),str.end());    cout << "Ats: " << a << endl;    cin.get();}