pat乙级1059

1、c++ 位数不够前面补零：

printf("04d", i);

位数不够前面补空格（右对齐）：

printf("4d", i);

位数不够后面补空格（左对齐）：

printf("-4d", i);

code:

#include <iostream>
#include <string>
#include <math.h>
using namespace std;
bool isSushu(int i)
{
    if (i < 2) return false;
    int t = sqrt(i);
    for (int j = 2; j <= t; j++)
    {
        if (i % j == 0) return false;
    }
    return true;
}
int main()
{
    int n;
    cin >> n;
    int arr[10000] = {};
    string award[5] = { "Are you kidding?", "Mystery Award", "Minion", "Chocolate", "Checked" };
    for (int i = 0; i < n; i++)
    {
        int id;
        cin >> id;
        if (i == 0) arr[id] = 1;
        else if (isSushu(i + 1)) arr[id] = 2;
        else arr[id] = 3;
    }
    int k;
    cin >> k;
    for (int i = 0; i < k; i++)
    {
        int id;
        cin >> id;
        printf("%04d: %s
", id, award[arr[id]].c_str());
        if (arr[id] > 0) arr[id] = 4;
    }
    return 0;
}