#include <stdio.h>

int main( void )
{
    int  num;
    char letter;
    char ch1, ch2;

    letter = 'A';    /* 'A' is character constant */
    num    = letter;
    ch1    = 'b';    /* ASCII code = 98 */
    ch2    = 'B';    /* ASCII code = 66 */

    printf( "Letter = %c, Num = %d\n", letter, num );
    printf( "Letter = %d, Num = %c\n", letter + 1, num );
    printf( "*%3c*\n", letter );
    printf( "*%-3c*\n", letter );
    printf( "%c - %c = %d\n", ch1, ch2, ch1 - ch2 );
}