题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++)cout<<"+-";
        cout<<'+'<<endl;
        for(int j=1;j<=m;j++)cout<<"| ";
        cout<<'|'<<endl;
    }
    for(int j=1;j<=m;j++)cout<<"+-";
    cout<<'+';
    return 0;
}