#include <iostream> #include <iomanip> using namespace std; void main() { char bookname[100];double price;int counts; cout << "请输入书名:"<< endl; cin>>bookname; cout << "请输入单价:"<< endl; cin>>price; cout << "请输入销售数量:"<< endl; cin>>counts; cout<<"使用状态标志和成员函数进行格式化输出"<<endl; cout<<"《"<<bookname<<"》:"; cout.width(5); //单价显示宽度为5个字符 cout.fill('*'); //宽度不满用*字符填充 cout<<price<<"(单价) "; //按照上面的格式设置输出 #ifdef scientific cout.setf(ios::scientific); //用科学记数法输出销售额 cout.precision(3); //保留3位精度 #else cout<<std::fixed; //不使用科学计数法输出 cout<<price*counts<<"(销售额) "; #endif cout.setf(ios::showpos|ios::left); //显示销售数量,带有正负号、左对齐 cout<<counts<<"(销售数量)"<<endl; cout<<"使用流操作符进行格式输出"<<endl; cout<<"《"<<bookname<<"》:" <<setw(5)<<setfill('*')<<price<<"(单价) " <<scientific<<setprecision(3)<<fixed<<price*counts<<"(销售额) " <<showpos<<left<<counts<<"(销售数量)"<<endl; cin>>bookname; }《VC++6.0示例程序光盘》实例代码