Here's my code:
#include<iostream>
using namespace std;
int pri[20000],pr[4040000];
void p()
{
    memset(pr,0,sizeof(pr));
    int i,j;
    for(i=2;i<=1500;i++)
        for(j=i*i;j<4000000;j+=i)pr[j]=1;
    int kk=1;
    for(i=2;i<=4000000;i++)
        if(pr[i]==0)pri[kk++]=i;
}
int main()
{
    int n,t;
    p();
    while(scanf("%d",&n)!=-1)
    {
    while(n--)
    {
        scanf("%d",&t);
        printf("%d\n",pri[t]);
    }
    }
    return 0;
}
What's wrong with it?Who can help me?

Edited by author 21.06.2013 21:02

Cheer up!
Solved!
Here's my code:(一个合适的范围是看来是很必要的啊！）
#include<iostream>
using namespace std;
int pri[20000];
int pr[204000];
void p()
{
    int i,j;
    for(i=0;i<=200000;i++)pr[i]=1;
    for(i=2;i<=447;i++)
        for(j=i*i;j<200000;j+=i)pr[j]=0;
    int kk=1;
    for(i=2;i<=200000&&kk<=15010;i++)
        if(pr[i])pri[kk++]=i;
}
int main()
{
    int n,t;
    p();
    while(scanf("%d",&n)!=-1)
    {
       while(n--)
       {
        scanf("%d",&t);
        printf("%d\n",pri[t]);
       }
    }
    return 0;
}