Global and local variables

1. Which of the following are invalid variable names and why?

Minimum        First.name        n1+n2              &name

doubles          3rd_row                n$                 Row1

fl oat              Sum Total           Row Total       Column-total

2. What would be the value of x after execution of the following statements?

int x, y = 10;

char z = ‘a’;

x = y + z;

3. Explain the following with examples:

(a) Enumerated types

(b) Type def

4. Distinguish between the following:

(a) Global and local variables

(b) Initialization and assignment of variables

(c) Automated and static variables

5. Find errors, if any, in the following declaration statements.