pat乙级1059

1、c++ 位数不够前面补零：

1 printf("04d", i);

位数不够前面补空格（右对齐）：

1 printf("4d", i);

位数不够后面补空格（左对齐）：

printf("-4d", i);

code:

 1 #include <iostream>
 2 #include <string>
 3 #include <math.h>
 4 using namespace std;
 5 bool isSushu(int i)
 6 {
 7     if (i < 2) return false;
 8     int t = sqrt(i);
 9     for (int j = 2; j <= t; j++)
10     {
11         if (i % j == 0) return false;
12     }
13     return true;
14 }
15 int main()
16 {
17     int n;
18     cin >> n;
19     int arr[10000] = {};
20     string award[5] = { "Are you kidding?", "Mystery Award", "Minion", "Chocolate", "Checked" };
21     for (int i = 0; i < n; i++)
22     {
23         int id;
24         cin >> id;
25         if (i == 0) arr[id] = 1;
26         else if (isSushu(i + 1)) arr[id] = 2;
27         else arr[id] = 3;
28     }
29     int k;
30     cin >> k;
31     for (int i = 0; i < k; i++)
32     {
33         int id;
34         cin >> id;
35         printf("%04d: %s
", id, award[arr[id]].c_str());
36         if (arr[id] > 0) arr[id] = 4;
37     }
38     return 0;
39 }