Purpose

• To create structs
• Access struct data
• Write functions that use and manipulate structs

Download Files

• All files need can be found in struct.zip

Exercise

1. weatherday.h contains the struct definition of WeatherDay. In weatherday.c, declare declare a static variable called day1 of type WeatherDay in function main().
• Initialize each value of struct day1 to value of your choice


2. Now create a pointer of type WeatherDay (call it dayptr) and set it to point to variable day1 in function main()


3. Complete the printWD() in weatherday.c to print data of the WeatherDay struct
• Note that function printWD takes a pointer to struct WeatherDay, so use the speacial notation ->
• Call the print(dayptr) in main function and see if prints the values you intialized in part 1


4. Complete function avgTemp in weatherday.c. Call it in main function to give you the average temperature for dayptr.


5. Complete intialize(WeatherDay * day) in weatherday.c, such that all the data of day is intialized to zero
   • In main(), call initialize(dayptr), and then call printDW(ptr), to see if the data values of the of the struct pointed by dayptr are intialized to zero
   • What would happen if function intialize in weatherday.c was written such that its input parameter was a variable of type WeatherDay and not WeatherDay * ?
   
   
6. Instead of intializing the data of day1, ask user to enter the values. Use dayptr to scan in the values using scanf().


7. Create a dynamic array of WeatherDay of size 5.
   1. Access the third element of the array and intialize the data to value of your choice. Then call the printDW and avgTemp for the third element.
   2. Now, for each element of the array, intialize the struct data to all zeros.
   3. Before exiting the program, remember to free the pointer used to allocate dynamic memory