1073 Scientific Notation (20分)

#include <iostream>
#include <cstring>
using namespace std;
int main()
{
    char s[10000];
    char res[10000];
    cin >> s;
    int len = strlen(s);
    int pos = 0;
    while (s[pos] != 'E') ++pos;
    int exp = 0;
    for (int i = pos + 2; i < len; ++i)
    {
        exp = 10 * exp + (s[i] - '0');
    }
    if (s[pos + 1] == '+')
    {
        if(s[0] == '-')cout << "-";
        for (int i = 1; i < pos; i++)
        {
            if (s[i] == '.')
                continue;
            cout << s[i];
            if(exp < pos-3 && i == pos-2)
                cout << ".";
        }
        for (int i = 0; i < exp - pos + 3; ++i)
            cout << '0';
    }
    else
    {
        if(s[0] == '-')cout << "-";
        cout <<  "0.";
        for(int i=0; i<exp-1; ++i)
        {
            cout << "0";
        }
        for(int i=1; i<pos; ++i)
        {
            if(s[i] == '.')continue;
            cout << s[i];
        }
    }
    return 0;
}