a. How many byte are allocated for each of the arrays? _____ char num_days[9]; _

Question

a. How many byte are allocated for each of the arrays?
_____ char num_days[9];
_____ signed int num_months[13];
_____ unsigned int my_dates[100] = {5, 56, 7, 9};
_____ char my_string1[10] = {‘C’, ‘P’, ‘R’, ‘E’, ‘ ‘, ‘2’, ‘8’, ‘8’};
_____ char my_string2[] = “CPRE 288”;

b. What is the value of each of the following (in decimal), using the array declarations from part a? Use “N/A” if the value is unknown.
_____ my_dates[0]
_____ my_dates[15]
_____ my_string1[3]
_____ my_string1[8]
_____ my_string2[8]

C. Explain the importance of the NULL character (i.e. ‘’ or 0) in a C-string

Explanation / Answer

a. How many byte are allocated for each of the arrays?
_____ char num_days[9]; each char is 1 byte, so 9 bytes
_____ signed int num_months[13]; each int is 4 bytes, so 52 bytes
_____ unsigned int my_dates[100] = {5, 56, 7, 9}; each int is 4 bytes, so 400 bytes
_____ char my_string1[10] = {‘C’, ‘P’, ‘R’, ‘E’, ‘ ‘, ‘2’, ‘8’, ‘8’}; each char is 1 byte, so 8 bytes
_____ char my_string2[] = “CPRE 288”; each char is 1 byte, and the string ends with a NULL character, so 9 bytes

b. What is the value of each of the following (in decimal), using the array declarations from part a? Use “N/A” if the value is unknown.
_____ my_dates[0] 5
_____ my_dates[15] 0 since its value was not specified above
_____ my_string1[3] 'E'
_____ my_string1[8] 0 since its value was not specified above
_____ my_string2[8] 0, strings are terminated by a NULL character

C. Explain the importance of the NULL character (i.e. ‘’ or 0) in a C-string

The NULL character terminates every string to indicate when the string ends, which is necessary to display it.

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