Program To Implement Static

/*   Program To Implement Static_Variable .
	    DISPLAY THE TRAIN NO.S THAT DEPART THE STATION BETWEEN
					    6PM->10PM.                 */

#include<stdio.h>
#include<conio.h>
void main()
{	const float train[6][3]={  { 6505 , 11.15 , 18.00},
				   { 7050 , 6.30  , 21.00},
				   { 8105 , 13.15 , 22.15},
				   { 6500 , 8.15  , 16.00},
				   { 7502 , 14.00 , 18.30},
				   { 6105 , 15.15 , 19.15},
				};
	int i,tno,sz;
	char op,ch;
	clrscr();
	printf("\n train no.s...\n");
	for( i=0;i<6;i++ )
	  printf("%f",train[i][0]);
	do
	 {  printf("\n enter train no.\n");
	    scanf("%d",&tno);
	    ch='n';
	    for( i=0;i<6;i++ )
	     {  if( train[i][0]==tno )
		{  printf("\n arrival time %f \n departure time %f",train[i][1],train[i][2]);
		   ch='y';
		   break;
		}
	     }
	    if( ch!='y' )
		printf("\n invailed train no. \n");
	     printf("\n enter 'y' or 'Y' to continue...\n");
	     op=getchar();
	 }
	while( op=='y' || op=='Y' );
	for( i=0;i<sz;i++ )
	  {  if( train[i][2]>=18 && train[i][2]<=22 )
		 printf("\n%f",train[i][0]);
	  }
	getch();
}

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