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1073.cpp
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1073.cpp
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#include <iostream>
#include <string>
using namespace std;
string buffer;
char integer;
string fraction;
char expsign;
unsigned int exponent;
string result;
void translate_buffer()
{
string::const_iterator iter = buffer.begin()+3;
string::const_iterator itmp = iter;
integer = buffer[1];
while (*iter != 'E')
{
++iter;
}
fraction.assign(itmp, iter);
++iter;
expsign = *iter;
++iter;
while (iter != buffer.end())
{
exponent = exponent*10 + *iter - '0';
++iter;
}
}
void clear_zeros()
{
string::iterator iter = result.begin();
while (*iter == '0')
{
++iter;
}
if (*iter == '.')
{
--iter;
}
result.erase(result.begin(), iter);
}
int main()
{
cin >> buffer;
translate_buffer();
if ('-' == buffer[0])
{
cout << '-';
}
// ´¦ÀíÌØÊâÇé¿ö
if (0 == exponent)
{
result.append(1, integer);
result.append(1, '.');
result.append(fraction.begin(), fraction.end());
cout << result << endl;
return 0;
}
if (expsign == '+')
{
result.insert(result.end(), integer);
if (fraction.size() <= exponent)
{
result.append(fraction.begin(), fraction.end());
result.append(exponent-fraction.size(), '0');
}
else
{
result.append(fraction.begin(), fraction.begin()+exponent);
result.insert(result.end(), '.');
result.append(fraction.begin()+exponent, fraction.end());
}
}
else
{
result.append(1, '0');
result.append(1, '.');
result.append(exponent-1, '0');
result.append(1, integer);
result.append(fraction.begin(), fraction.end());
}
clear_zeros();
cout << result << endl;
system("pause");
return 0;
}