Im having trouble with this code...it showing me error: jump to case label[fpermissive] and error: crosses intialization of 'int cnt'..please do help me solve this error.Tq.

#include <iostream>
#include <fstream>
#include <string.h>
#include <iomanip>
#include <conio.h>
using namespace std;

void clrscr() {
  #ifdef WINDOWS
  system("cls");
  #endif
  #ifdef LINUX
  system("clear");
  #endif
}

class phoneBook{
	char name[20],phno[15];
	public:
	void getdata();
	void showdata();
	char *getname(){ return name; }
	char *getphno(){ return phno; }
	void update(char *nm,char *telno){
		strcpy(name,nm);
		strcpy(phno,telno);
	}
};

void phoneBook :: getdata(){
	cout<<"\nEnter Name : ";
	cin>>name;
	cout<<"Enter Phone No. : ";
	cin>>phno;
}

void phoneBook :: showdata(){
	cout<<"\n";
	cout<<setw(20)<<name;
	cout<<setw(15)<<phno;
}


int main(){
	phoneBook rec;
	fstream file;
	file.open("d:\\phone.dat", ios::ate | ios::in | ios::out | ios::binary);
	char ch,nm[20],telno[6];
	int choice,found=0;
	while(1){
		clrscr();
		cout<<"\n*****Phone Book*****\n";
		cout<<"1) Add New Record\n";
		cout<<"2) Display All Records\n";
		cout<<"3) Search Telephone No.\n";
		cout<<"4) Search Person Name\n";
		cout<<"5) Update Telephone No.\n";
		cout<<"6) Exit\n";
		cout<<"Choose your choice : ";
		cin>>choice;
		switch(choice){
			case 1 : //New Record
				 rec.getdata();
				 cin.get(ch);
				 file.write((char *) &rec, sizeof(rec));
				 break;

			case 2 : //Display All Records
				 file.seekg(0,ios::beg);
				 cout<<"\n\nRecords in Phone Book\n";
				 while(file){
					file.read((char *) &rec, sizeof(rec));
					if(!file.eof())
						rec.showdata();
				 }
				 file.clear();
				 getch();
				 break;

			case 3 : //Search Tel. no. when person name is known.
				 cout<<"\n\nEnter Name : ";
				 cin>>nm;
				 file.seekg(0,ios::beg);
				 found=0;
				 while(file.read((char *) &rec, sizeof(rec)))
				 {
					if(strcmp(nm,rec.getname())==0)
					{
						found=1;
						rec.showdata();
					}
				 }
				 file.clear();
				 if(found==0)
					cout<<"\n\n---Record Not found---\n";
				 getch();
				 break;

			case 4 : //Search name on basis of tel. no
				 cout<<"\n\nEnter Telephone No : ";
				 cin>>telno;
				 file.seekg(0,ios::beg);
				 found=0;
				 while(file.read((char *) &rec, sizeof(rec)))
				 {
					if(strcmp(telno,rec.getphno())==0)
					{
						found=1;
						rec.showdata();
					}
				 }
				 file.clear();
				 if(found==0)
					cout<<"\n\n---Record Not found---\n";
				 getch();
				 break;

			case 5 : //Update Telephone No.
				 cout<<"\n\nEnter Name : ";
				 cin>>nm;
				 file.seekg(0,ios::beg);
				 found=0;
				 int cnt=0;
				 while(file.read((char *) &rec, sizeof(rec)))
				 {
					cnt++;
					if(strcmp(nm,rec.getname())==0)
					{
						found=1;
						break;
					}
				 }
				 file.clear();
				 if(found==0)
					cout<<"\n\n---Record Not found---\n";
				 else
				 {
					int location = (cnt-1) * sizeof(rec);
					cin.get(ch);
					if(file.eof())
						file.clear();

					cout<<"Enter New Telephone No : ";
					cin>>telno;
					file.seekp(location);
					rec.update(nm,telno);
					file.write((char *) &rec, sizeof(rec));
					file.flush();
				 }
				 break;
			case 6 : goto out;
		}
	}
out:
file.close();
return 0;
}