让
for(i =0; i<t; i++) {
        if(TelNum[i].n < 2)////**********在这
            continue;
        f = 0;
        for(j =0; j< 7; j++) {
            if(j==3)
                cout<<"-";
            cout<<TelNum[i].tel[j];
        }
        cout<<" "<<TelNum[i].n<<endl;
    }