Node:Questions for Chapter 5, Previous:Storage classes, Up:Variables and declarations

Questions for Chapter 5

1. What is an identifier?
2. Which of the following are valid C variable names?
   1. Ralph23
   2. 80shillings
   3. mission_control
   4. A%
   5. A$
   6. _off
3. Write a statement to declare two integers called start_temperature and end_temperature.
4. What is the difference between the types float and double?
5. What is the difference between the types int and unsigned int?
6. Write a statement that assigns the value 1066 to the integer variable norman.
7. What data type do C functions return by default?
8. You must declare the data type a function returns at two places in a program. Where?
9. Write a statement, using the cast operator, to print out the integer part of the number 23.1256.
10. Is it possible to have an automatic global variable?