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  1.  
  2.  
  3. #include<cstdio>
  4. #include<cstdlib>
  5. #include<vector>
  6. #include<string>
  7. #include<iostream>
  8. #include<algorithm>
  9. using namespace std;
  10. int main()
  11. {
  12.    vector<char> V;
  13.    string S;
  14.    int i=0;
  15.    float f=3.14156;
  16.    float x=f*1e6;
  17.    long long int y=(long long int)(x);
  18.    while(y)
  19.    {
  20.         V.push_back(y%10+'0');
  21.         y/=10;
  22.    }
  23.    reverse(V.begin(),V.end());
  24.    for(i=0;i<V.size()-6;i++)
  25.    {
  26.         S.push_back(V[i]);
  27.    }
  28.    S.push_back('.');
  29.    for(;i<V.size();i++)
  30.         S.push_back(V[i]);
  31.  
  32.    i=S.size();
  33.    while(i--)
  34.    {
  35.         if(S[i]=='0')
  36.         S.erase(S.begin()+i);
  37.         else break;
  38.    }
  39. cout<<S<<"\n";
  40. //system("pause");
  41. return 0;
  42. }
Success #stdin #stdout 0s 2820KB
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stdin
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Standard input is empty
stdout
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3.14156
https://ideone.com/Z8wBD7
language:
C++ 4.3.2 (gcc-4.3.2)
created:
12 years ago
visibility:
secret

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