question archive Overview This hands-on lab allows you to follow and experiment with the critical steps of developing a program including the program description, analysis, test plan, and implementation with C code
Overview This hands-on lab allows you to follow and experiment with the critical steps of developing a program including the program description, analysis, test plan, and implementation with C code
Subject:Computer SciencePrice: Bought3
Overview
This hands-on lab allows you to follow and experiment with the critical steps of developing a program including the program description, analysis, test plan, and implementation with C code. The example provided uses sequential, repetition, selection statements, functions, strings and arrays.
Program Description
This program will input and store meteorological data into an array. The program will prompt the user to enter the average monthly rainfall for a specific region and then use a loop to cycle through the array and print out each value. The program should store up 5 years of meteorological data. Data is collected once per month. The program should provide the option to the user of not entering any data.
Analysis
I will use sequential, selection, and repetition programming statements and an array to store data.
I will define a 2-D array of Float number: Raindata[][] to store the Float values input by the user. To store up to 5 years of monthly data, the array size should be at least 5*12 = 60 elements. In a 2D array this will be RainData[5][12]. We can use #defines to set the number of years and months to eliminate hard-coding values.
A float number (rain) will also be needed to input the individual rain data.
A nested for loop can be used to iterate through the array to enter Raindata. A nested for loop can also be used to print the data in the array.
A array of strings can be used to store year and month names. This will allow a tabular display with labels for the printout.
Functions will be used to separate functionality into smaller work units. Functions for displaying the data and inputting the data will be used.
A selection statement will be used to determine if data should be entered.
Test Plan
To verify this program is working properly the input values could be used for testing:
Test Case
Input
Expected Output
1
Enter data? = y
year
month
rain
1.2
2011
Jan
1.20
2.2
2011
Feb
2.20
3.3
2011
Mar
3.30
2.2
2011
Apr
2.20
2011
May
10.20
10.2
2011
Jun
12.20
12.2
2011
Jul
2.30
2.3
2011
Aug
0.40
0.4
2011
Sep
0.20
0.2
2011
Oct
1.10
1.1
2011
Nov
2.10
2.1
2011
Dec
0.40
1
0.4
2012
Jan
1.10
1.1
2012
Feb
2.20
2.2
2012
Mar
3.30
3.3
2012
Apr
2.20
2.2
2012
May
10.20
2012
Jun
12.20
10.2
2012
Jul
2.30
12.2
2012
Aug
0.40
2.3
2012
Sep
0.20
0.4
2012
Oct
1.10
0.2
2012
Nov
2.10
1.1
2012
Dec
0.40
2.1
2013
Jan
1.10
0.4
2013
Feb
2.20
1.1
2013
Mar
3.30
2.2
2013
Apr
2.20
3.3
2013
May
10.20
2.2
2013
Jun
12.20
10.2
2013
Jul
2.30
12.2
2013
Aug
0.40
2.3
2013
Sep
0.20
2013
Oct
1.10
0.4
2013
Nov
2.10
0.2
2013
Dec
0.40
1.1
2014
Jan
1.10
2.1
2014
Feb
2.20
0.4
2014
Mar
3.30
1.1
2014
Apr
2.20
2.2
2014
May
10.20
3.3
2014
Jun
12.20
2.2
2014
Jul
2.30
10.2
2014
Aug
0.40
12.2
2014
Sep
0.20
2.3
2014
Oct
1.10
0.4
2014
Nov
2.10
0.2
2014
Dec
0.40
1.1
2015
Jan
1.10
2015
Feb
2.20
2.1
2015
Mar
3.30
0.4
2015
Apr
2.20
1.1
2015
May
10.20
2.2
2015
Jun
12.20
3.3
2015
Jul
2.30
2.2
2015
Aug
0.40
10.2
2015
Sep
0.20
12.2
2015
Oct
1.10
2.3
2015
Nov
2.10
0.4
2015
Dec
0.40
0.2
Please try the
1.1
Precipitation program
2.1
again.
0.4
2
Enter data? = n
No data was input at
this time.
2
Please try the Precipitation program again.
C Code
The following is the C Code that will compile in execute in the online compilers.
C code This program will input and store meteorological data into an array. Developer: Faculty CMIS102 Date: Jan 31, XXXX
#define NUMMONTHS 12 #define NUMYEARS 5 #include <stdio.h>
function prototypes void inputdata();
void printdata();
Global variables These are available to all functions float Raindata[NUMYEARS][NUMMONTHS];
char years[NUMYEARS][5] = {"2011","2012","2013","2014","2015"}; char months[NUMMONTHS][12]
={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; int main ()
{
char enterData = 'y';
printf("Do you want to input Precipatation data? (y for yes)\n"); scanf("%c",&enterData);
if (enterData == 'y') {
// Call Function to Input data inputdata();
// Call Function to display data printdata();
}
else {
printf("No data was input at this time\n");
}
printf("Please try the Precipitation program again. \n"); return 0;
}
// function to inputdata void inputdata() {
/* variable definition: */ float Rain=1.0;
// Input Data
for (int year=0;year < NUMYEARS; year++) {
for (int month=0; month< NUMMONTHS; month++) { printf("Enter rain for %d, %d:\n", year+1, month+1); scanf("%f",&Rain);
Raindata[year][month]=Rain;
3
}
}
}
Function to printdata void printdata(){ Print data
printf ("year\t month\t rain\n");
for (int year=0;year < NUMYEARS; year++) {
for (int month=0; month< NUMMONTHS; month++) {
printf("%s\t %s\t %5.2f\n", years[year],months[month],Raindata[year][month]);
}
}
}
Setting up the code and the input parameters in ideone.com:
You can change these values to any valid integer values to match your test cases.
4
Results from running the programming at ideone.com
5
Learning Exercises for you to complete
Modify the program to add a function to sum the rainfall for each year. (Hint: you need to sum for each year. You can do this using a looping structure). Support your experimentation with screen captures of executing the new code. Enhance the program to allow the user to enter another meteorological element such as windspeed (e.g. 2.4 mph). Note, the user should be able to enter both rainfall and windspeed in your new implementation. Support your experimentation with screen captures of executing the new code. Prepare a new test table with at least 2 distinct test cases listing input and expected output for the code you created after step 2. What happens if you change the NUMMONTHS and NUMYEARS definitions to other values? Be sure to use both lower and higher values. Describe and implement fixes for any issues if errors results. Support your experimentation with screen captures of executing the new code.
Grading guidelines
Submission
Points
Successfully demonstrates execution of this lab with online
2
compiler. Includes a screen capture.
Modifies the code to add a function to sum the rainfall for
2
each year. Support your experimentation with screen
captures of executing the new code
Enhances the program to allow the user to enter another
2
meteorological element such as windspeed (e.g. 2.4 mph).
Support your experimentation with screen captures of
executing the new code.
Provides a new test table with at least 2 distinct test cases
1
listing input and expected output for the code you created
after step 2.
Describes what would happen if you change the
2
NUMMONTHS and NUMYEARS definitions to other values?
Applies both lower and higher values. Describes and
implements fixes for any issues if errors results. Support your
experimentation with screen captures of executing the new
code
Document is well-organized, and contains minimal spelling
1
and grammatical errors.
Total
10
6
