char ch;    
scanf("%c", &ch);    Read the next character
ch = getchar();    Read the next character (plain C)
cin.get(ch)    Read the next character
scanf(" %c", &ch);    Read the next non-blank character
cin >> ch    Read the next non-blank character
printf("%c", ch);    Print a character
putchar(ch);    Print a character (plain C)
cout << ch    Print a character
ch + 5    Arithmetic on chars is okay.
ch - 'a' + 'A'    Change case
#include <ctype.h>    
#include <cctype>    
isalpha(ch)    
isupper(ch)    
. . .    
toupper(ch)    
toascii(ch)