1073 Scientific Notation (20 分)

模拟题

#include 
#include  
using namespace std;
int main() {
	string a, s;
	cin >> a;
	int p = a.find('E'), wei = stoi(a.substr(p + 2));
	if(a[p + 1] == '+'){
		s += a[1];
		for(int i = 3; i < 3 + wei; ++i){
			if(i >= p)
				s += '0';
			else
				s += a[i];
		}
		if(3 + wei < p)
			s += '.' + a.substr(3 + wei,  p - 3 - wei);
	}
	else{
		if(wei > 0){
			s = a[1] + s;
			for(int i = 1; i < wei; ++i)
				s = '0' + s;
			s = "0." + s + a.substr(3, p - 3);
		}
	}
	if(a[0] == '-')
		s = "-" + s; 
	cout << s;
}