C++格式输出——随时更新

Ex1.cpp

#include <iostream>using namespace std;int main(void){ cout.width(20); cout << "hello" << endl; //右对齐输出hello,占20个字符 // cout.precision(4); cout << 2006.526 << endl; //输出2007 // cout.precision(5); cout << 2006.526 << endl; //输出2006.5 // cout.precision(7); cout << 2006.526 << endl; //输出2006.526 // cout.width(20); cout.fill('*'); cout << "baby" << endl; //输出**************baby return 0;}

OutPut：

hello20072006.52006.526****************babyProcess returned 0 (0x0) execution time : 0.063 sPress any key to continue.

 

Ex2.cpp

#include <iostream>using namespace std;int main(void){cout.setf(ios::scientific | ios::uppercase);cout << 2006.5 << endl;//cout.setf(ios::floatfield,ios::fixed | ios::showpos);cout << 2006.5 << endl;//cout.setf(ios::showpos);cout << 2006.5 << endl;return 0;} 

OutPut:

2.006500E+0032006.5+2006.5Process returned 0 (0x0) execution time : 0.055 sPress any key to continue. 

Ex3.cpp

#include <iostream>#include <iomanip>using namespace std; int main(void){cout << setw(20) << "hello" << endl;cout << setprecision(4) << 2006.526 << endl;cout << setw(20) << setfill('*') << "baby" << endl;cout << scientific << 300.89 << endl;cout << oct << 9 << endl;cout << dec << showpos << 172 << endl;cout << noshowpos << 172 << endl;cout << boolalpha << true << endl;return 0;} 

OutPut:

hello2007****************baby3.0089e+00211+172172trueProcess returned 0 (0x0) execution time : 0.099 sPress any key to continue.