我的代码:
#include <iostream>
#include <iomanip>
using namespace std;
int main () {
int time;
int honolulu, seattle, london, moscow, hongkong, auckland;
cout << "What is the current time in Philadelphia? ";
cin >> time;
honolulu = (time+2400-600)%2400;
seattle = (time+2400-300)%2400;
london = (time+2400+500)%2400;
moscow = (time+2400+800)%2400;
hongkong = (time+2400+1200)%2400;
auckland = (time+2400+1700)%2400;
cout << endl << "Current times in other cities: " << endl;
cout << setw (12) << left << "Honolulu:";
cout << setw (4) << setfill('0') << honolulu << endl;
cout << setw (12) << left << "Seattle:";
cout << setw (4) << setfill('0') << seattle << endl;
cout << setw (12) << left << "London:";
cout << setw (4) << setfill('0') << london << endl;
cout << setw (12) << left << "Moscow:";
cout << setw (4) << setfill('0') << moscow << endl;
cout << setw (12) << left << "Hong Kong:";
cout << setw (4) << setfill('0') << hongkong << endl;
cout << setw (12) << left << "Auckland:";
cout << setw (4) << setfill('0') << auckland << endl;
return 0;
}
所需输出:
What is the current time in Philadelphia? 0415
Current times in other cities:
Honolulu: 2215
Seattle: 1150
London: 9150
Moscow: 1215
Hong Kong: 1615
Auckland: 2115
我的输出:
What is the current time in Philadelphia? 0415
Current times in other cities:
Honolulu: 2215
Seattle:00001150
London:000009150
Moscow:000001215
Hong Kong:001615
Auckland:0002115
我做错了什么?输出的第一行,Honolulu: 2215
,是正确的。但是接下来的几行有前导零。我不明白为什么会这样?我的代码有问题还是我对函数 setfill
和 setw
的工作原理有误解?
std::setfill
将设置填充字符用于所有接下来的输出。 - Some programmer dude