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1073.cpp
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1073.cpp
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// 1073.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
string fx;
string orignal;
int k = 0;
int start = 0;
int p_end;
int pro_pos = 0;
int zero_count = 0;
int main()
{
cin >> fx;
if (fx[0] == '+' || fx[0] == '-')
start = 1;
else
start = 0;
pro_pos = start + 1;
for (p_end = start; fx[p_end] != 'E'; p_end++);
orignal = fx.substr(start, p_end-1);//pend point to E pos
sscanf(&fx.substr(p_end + 1, fx.size() - 1)[0], "%d", &k);
if (fx[0] == '-')
cout << '-';
if (pro_pos + k +1>=p_end )
{
for (int i = 0; i < orignal.size(); i++)
{
if (orignal[i] != '.')
cout << orignal[i];
}
zero_count = pro_pos + k + 1 - p_end;
while (zero_count--)
cout << '0';
//说明是大于后面的次数
}
else if (pro_pos + k < p_end-1 && k>=0)
{
for (int i = 0; i < orignal.size(); i++)
{
if (orignal[i] != '.')
cout << orignal[i];
if (pro_pos + k -1 == i)
cout << '.';
}
}
else
{
cout << "0.";
zero_count = abs(k)-1;
while (zero_count--)
cout << '0';
for (int i = 0; i < orignal.size(); i++)
{
if (orignal[i] != '.')
cout << orignal[i];
}
}
cin >> zero_count;
return 0;
}