I use c++,my code is behind. But there is a weird problem . When i define n as int and use cin>>n,the program can't receive the name have more than two word or have symbols like '-'. So i have to define n as a string and transfer the string into a int,why this strange thing happen?

#include<iostream>
#include<string.h>
#include<cstring>
using namespace std;

int main()
{
    char room[4][1000][210];
    memset(room,0,sizeof(room));
    int k=0,nth[4]={0};
    char n[10];
    cin.getline(n,10,'\n');
    int len=10;
    while(n[len]=='\0'){len--;}
    int temp=1;
    for(int i=len;i>=0;i--)
    {
        k+=(n[i]-48)*temp;
        temp*=10;
    }

    for(int i=0;i<k;i++)
    {
        char temp[210],temp1[20];
        cin.getline(temp,210,'\n');
        cin.getline(temp1,20,'\n');

        if(temp1[0]=='S')
        {
            strcpy(room[0][nth[0]],temp);
            nth[0]++;
        }
        else if(temp1[0]=='H')
        {
            strcpy(room[1][nth[1]],temp);
            nth[1]++;
        }
        else if(temp1[0]=='G')
        {
            strcpy(room[2][nth[2]],temp);
            nth[2]++;
        }
        else {
            strcpy(room[3][nth[3]],temp);
            nth[3]++;
        }
    }
    /* omit so this is not a correct solution*/
}