[C++知识库]cout 格式控制 ( C++ )

http://c.biancheng.net/view/275.html

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<iomanip>
using namespace std;

typedef long long ll;

int main() {
	//TODO

	int a=123;
	cout<<oct<<a<<ends<<dec<<a<<ends<<hex<<a<<ends<<showbase<<a<<endl;
	cout<<showbase<<setbase(8)<<a<<ends<<setbase(10)<<a<<endl;
	cout<<showpoint<<a<<endl;
	cout<<showpos<<a<<endl;
	cout<<noshowpos;

	double b=1e-8+123456;
	cout<<fixed<<b<<endl;
	cout<<setprecision(10)<<fixed<<b<<endl;

	cout<<setw(13)<<setprecision(10)<<fixed<<b<<endl;

	b=123;
	cout<<scientific<<b<<endl;

	a=123;
	cout<<setfill('a')<<setw(10)<<a<<endl;



	return 0;
}