c++输出左右对齐设置

#include<iostream>
int main(){
    using std::cout;
    cout.setf(std::ios::left);
    int w = cout.width();
    cout << "default field width = " << w << "\n";
    cout.width(5);
    cout << "N" << ":";
    cout.width(8);
    cout << "N * N" << "\n";
   for (long i = 1; i <= 100; i *= 10){
        cout.width(5);
        cout << i << ‘:‘;
        cout.width(8);
        cout << i * i << "\n";
    }
    return 0;
}

1    cout<<right<<setw(4)<<"111";
2    cout<<left<<setw(5)<<"222";
这个就可以实现左边右边

1    cout<<right<<setw(4)<<setfill(‘*‘)<<"111";
2    cout<<left<<setw(5)<<"222";
setfill慎用！
他也是对全局有效的！