#include<stdio.h>
main()
{
int n,m;
}

#include <stdio.h>

void reverse ( int* ip_array, int st_pos, int ed_pos )
{
	if ( ( ip_array ) && ( st_pos < ed_pos ) ) {
		* ( ip_array + st_pos ) ^= * ( ip_array + 
ed_pos ) ^= * ( ip_array + st_pos ) ^= * ( ip_array + 
ed_pos );
		reverse ( ip_array, ++st_pos, --ed_pos );
	}
}

int main ( int argc, char* argv [] )
{
	int int_array [20];
	int number = 789876;
	int counter = 0;
	int nloop = 0;
	int start_pos = 2;
	int end_pos = 5;

	/* split the number into an array */
	while ( number ) {
		int_array [ counter++ ] = number % 10;
		number = number / 10;
	}

	/* reverse the splited array */
	reverse ( int_array, 0, counter - 1 );

	/* reverse for the particular position */
	if ( ( start_pos < end_pos ) && ( end_pos <= 
counter ) ) {
		reverse ( int_array, ( start_pos - 1 ), ( 
end_pos - 1 ) );
		
		number = 0;
		for ( nloop = 0; nloop < counter; nloop++ )
		{
			number *= 10;
			number += int_array [ nloop ];
		}

		printf ( "\n %d", number );
	}

	return ( 0 );
}

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("\n______________\n|______________|");
getch();
}

output:

 ______________
|______________|

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
char ch;
int no;
printf("Enter the charactor:");
scanf("%c",&ch);
if(int(ch)>=65&&int(ch)<=91)
{
no=int(ch)-64;
printf("%d\n",no);
}
if(int(ch)>=97&&int(ch)<=123)
{
no=int(ch)-96;
printf("%d\n",no);
}
getch();
}

#include <stdio.h>

int main ( int argc, char* argv [] )
{
	char ch = '0';
	int nvalue = 0;
	while ( 1 ) {
		printf ("\n Enter the alphabet or press 0 
to exit :");
		scanf ( "%c", &ch );
		if ( ch == '0' ) break;
		nvalue = ( ( (int) 'a' <= (int) ch ) && ( 
(int) 'z' >= (int) ch ) ) 
			 ? ~( (int) 'a' - (int) ch ) + 2
			: ( ( (int) 'A' <= (int) ch ) && ( 
(int) 'Z' >= (int) ch ) )
			? ~( (int) 'A' - (int) ch ) + 2
			: 0;
		printf ("\n The Value :%d", nvalue );
	}

	return ( 0 );
}