题解 | #查找学生信息#

#include <iostream>
#include <ostream>
#include <random>
#include<string>
using namespace std;
struct stu
{
    string number;
    string name;
    string sex;
    int age;
};
int main() {
    int n,m;
    cin>>n;
    stu *a=(stu*)malloc(sizeof(stu)*n);
    //cout<<n<<endl;
    for(int i=0;i<n;i++)
    {
        a[i].number.resize(4);
        a[i].name.resize(10);
        a[i].sex.resize(2);
        cin>>a[i].number>>a[i].name>>a[i].sex>>a[i].age;
    }
    cin>>m;
    //cout<<m<<" "<<n<<endl;
    for(int i=0;i<m;i++)
    {
        string s;
        cin>>s;
        int flag=0;
        for(int i=0;i<n;i++)
        {
            if(a[i].number==s)
             {  
                flag=1;
                //cout<<"i="<<i<<endl;
                cout<<a[i].number<<" "<<a[i].name<<" "<<
                a[i].sex<<" "<<a[i].age<<endl;
             }
        }
        if(!flag)cout<<"No Answer!"<<endl;
    }

}
// 64 位输出请用 printf("%lld")