1. To check whether a character is lower case letter or not#define LOWER (alpha>=97 && alpha<=122)
2. To check whether a character is upper case letter or not #define UPPER (alpha>=65 && alpha<=90)
3. To check whether a character is an alphabet or not. Make use of the macros you defined in 1 and 2 above.#define UPPER (alpha>=65 && alpha<=90)#define LOWER (alpha>=97 && alpha<=122)#define YES (UPPER || LOWER)
4. To obtain the bigger of two numbers#define MAX(a,b) ((a>b)?a:b)
