Tela login

int login()
{
    int i;
    int id[3]={1,2,3};
    char name[3][5]={"tom","jim","kim"};
    char pwd[3][5]={"123","456","789"};
    int flag=0;
    char user[5];
    char pass[5];
    printf("please input your user name:\n");
    scanf("%s",user);
    printf("please input your password:\n");
    scanf("%s",pass);
    for(i=0;i<3;i++)
    {
        if(strcmp(name[i],user)==0)
        {
            if(strcmp(pwd[i],pass)==0)
            {
                printf("login successfully,your id is %d\n",id[i]);
                flag=1;
            }
        }
    }
    if(flag==0)
    {
        printf("login failed\n");
    }
    return 0;
}