判断子串 + 结构体运用

#include<bits/stdc++.h>
using namespace std;
struct number{
    string name,num;
}a[10001];
int main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i].name>>a[i].num;
    string k;
    cin>>k;
    int temp=1;
    for(int i=1;i<=n;i++){
        if(a[i].num.find(k)!=-1){
            temp=0;
            cout<<a[i].name<<" "<<a[i].num;
        	cout<<endl;
        }
    }
    if(temp) cout<<"None.";
    return 0;
}