Answer Posted / abdur rab

#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 );
}

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