Queue as an Array

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 //Downloaded From www.c4cpp.co.nr  
 //(C)2009.All rights reserved.  
 #include<iostream.h>  
 #include<conio.h>  
 #include<process.h>  
 void main()  
 {  
 clrscr();  
 int ch,i,rear=-1,front=-1,queue[10];  
 x:  
 cout<<endl<<endl;  
 cout<<"Enter Choice 1> Insert 2> Delete 3>exit "<<endl;  
 cin>>ch;  
 switch(ch)  
 {  
 case 1:  
 if(front==-1)  
 {front=0;}  
 rear++;  
 if(rear<=9)  
 {cout<<"Enter The Element"<<endl;  
 cin>>queue[rear];  
 cout<<"Queue is"<<endl;  
 for(i=0;i<=rear;i++)  
 {cout<<queue[i];}  
 }  
 else  
 {cout<<"****************QUEUE OVERFLOW****************";  
 }  
 goto x;  
 case 2:  
 if(rear==-1)  
 {rear=0;}  
 if(front==-1)  
 {cout<<"*************** UNDER FLOW **********"<<endl;goto x;}  
 else  
 if(rear==front)  
 {queue[front]='\o';  
 front=-1;  
 rear=-1;  
 goto x;  
 }  
 else  
 {queue[front]='\o';  
 front++;  
 }  
 cout<<"Queue is"<<endl;  
 for(i=0;i<=rear;i++)  
 {cout<<queue[i];}  
 goto x;  
 case 3:  
 exit(0);  
 default :  
 goto x;  
 }}