setf.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 24 行

#include <iostream>
using namespace std;

int main()
{
    float pi = 3.14159;

    cout.setf(ios_base::showpos);	
    cout << pi << endl;

    cout.setf(ios_base::fixed, ios_base::floatfield);
    cout.precision(2);
    cout << pi << endl;

    cout.precision(3);
    cout << pi << endl;

    cout.setf(ios_base::scientific, ios_base::floatfield);
    cout.setf(ios_base::uppercase);
    cout.precision(4);
    cout << pi << endl;

    return 0;
}