题解 | #查找学生信息#

用结构体数组来实现随机查找

定义student结构体数组，下标和学号对应，即可实现学号直接查找学生

因为学号前面带0，所以要用aoti函数转string为int

#include<string>
using namespace std;
struct student{
    string num;
    string name;
    string gender;
    int age;
    bool flag;
    student():flag(false){}
    student(string n, string na, string g,int a):flag(true),num(n),name(na),gender(g),age(a){}
};
int main(){
    struct student stus[1000];
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
        string num, name, gender;
        int age;
        cin>>num>>name>>gender>>age;
        stus[atoi(num.c_str())] = student(num,name,gender,age);
    }
    int m;
    cin>>m;
    for(int i=0;i<m;i++){
        int x;
        cin>>x;
        if(stus[x].flag)
            cout<<stus[x].num<<" "<<stus[x].name<<" "<<stus[x].gender<<" "<<stus[x].age<<endl;
        else
            cout<<"No Answer!"<<endl;
    }
}