State if each of the following is a legal C identifier: What is the output of th

Question

State if each of the following is a legal C identifier: What is the output of the following? If the program outputs any spaces, clarify how many. Write calls to printf to display the float x in the following format: Exponential notation, left justified, in field size of 7 with 2 digits after the decimal point Decimal notation, with +/- sign always written, right justified, in field size of 10, with 3 digits after the decimal point, and 0 used for any padding necessary Assume that a and b are int variables and x is a float variable. What is the value of each variable after the following scanf is called: Write a statement to read the time from standard input in the form of hh:mm:ss and store it in three integer variables denoting the hours, minutes and seconds.

Explanation / Answer

Question 1)

Main- legal

2016Average- illegal(all identifiers must start with a letter or underscore)

$alpha- illegal( identifiers must only consist of letters digits and underscore nothing else)

_username- legal(starting with _ is legal but not preferred)

Question 2)

a)

Output is: +35

2 spaces between : and + in answer if there is no space between : and % in question

3 spaces between : and + in answer if there is 1 space between : and % in question

b)

1.2510E+01

Question 3)

a)printf("%7.2E",7245.5566);

b)printf("%+10.3f",-35.22);

Question 4)

5 7.0 10

Question 5)

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