Question

1. Write a C++ program that reads daily weather observation data from a file and writes monthly and annual summaries of the daily data to a file.

a. The daily weather data will be contained in a file named wx_data.txt, with each line of the file representing the weather data for a single day.

b. For each day, the date, precipitation amount, maximum temperature, and minimum temperature will be provided as tab-separated data with the following format: 20180101 0.02 37 23 20180102 0.00 42 18

c. For the first entry in the daily data above, the date is 20180101 (1 January 2018), the precipitation amount is 0.02 inches, the maximum temperature is 37°F, and the minimum temperature is 23°F.

d. You may assume that the weather data is complete (i.e., there is data for each day of every month of the year) and that the data contains no errors.

2. The program must read from file each daily weather observation and write a summary by month and year to a file named wx_summary.txt.

a. The output that is written to file must have the following format:

------------------- January -------------------

Precipitation Total: 3.12

Average: 0.10

Temperature Maximum: 62

Minimum: 39

-------------------

February -------------------

Precipitation Total: 10.18

Average: 0.36

Temperature Maximum: 78

Minimum: 64

------------------- -------------------

December -------------------

Precipitation Total: 16.55

Average: 0.53

Temperature Maximum: 72

Minimum: 67

-------------------

Max temp for year: 98 in May

Min temp for year: 21 in January

Max precip for year: 18.25 in September

-------------------

3. The program must not print any output to the screen except for error messages.

4. The output file must be named wx_summary.txt and the format must match exactly the format of the sample output file.

The following code will compute the year, month, and day from the date format of the file: int date; inFile >> date; // date read from file, e.g., 20180101 int year = date / 10000; int month = (date % 10000) / 100; int day = date % 100;

It is highly recommended NOT to use arrays to complete this project, nor should you modify the .weather data file.

//wx_data.txt there are 365 lines and i cannot post it here because its long.

20180101   0.00   39   26
20180102   0.00   44   23
20180103   0.00   46   32
20180104   0.00   47   27
20180105   0.00   53   29
20180106   0.00   58   30

Answer 1

Code:

Code as text:

#include <iostream>

#include <fstream>

using namespace std;

// structure to read data

struct WeatherData {

int date;

float precipitation;

int maxTemp, minTemp;

};

int main() {

WeatherData data[366];

// open file and read data in the structure

ifstream inFile;

inFile.open("wx_data.txt");

int date, minTemp, maxTemp;

float ppt;

int i = 0;

while(inFile >> date >> ppt >> maxTemp >> minTemp) {

data[i].date = date;

data[i].precipitation = ppt;

data[i].minTemp = minTemp;

data[i].maxTemp = maxTemp;

i++;

}

int totalDays = i;

inFile.close(); // close the file

// an array for month names

string monthName[] = {"", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

int yearMaxTemp = -400, yearMaxMonth;

int yearMinTemp = 400, yearMinMonth;

float yearMaxPpt = -100;

int yearMaxPptMonth;

// open outfile

ofstream outFile;

outFile.open("wx_summary.txt");

i = 0;

// process the data and write to file

while (i != totalDays) {

int monthDays = 1;

date = data[i].date;

int curMonth = (date % 10000) / 100;

int curMinTemp = 400;

int curMaxTemp = -400;

float totalPpt = 0;

// process data for each month

while (true) {

i++;

date = data[i].date;

int month = (date % 10000) / 100;

if (month != curMonth)

break;

monthDays++;

totalPpt += data[i].precipitation;

curMaxTemp = max(data[i].maxTemp, curMaxTemp);

curMinTemp = min(data[i].minTemp, curMinTemp);

}

if (curMaxTemp > yearMaxTemp) {

yearMaxTemp = curMaxTemp;

yearMaxMonth = curMonth;

}

if (curMinTemp < yearMinTemp) {

yearMinTemp = curMinTemp;

yearMinMonth = curMonth;

}

if (totalPpt > yearMaxPpt) {

yearMaxPpt = totalPpt;

yearMaxPptMonth = curMonth;

}

// write data in file

string dash(15, '-');

outFile << dash << monthName[curMonth] << dash << endl;

outFile << "Precipitation\n";

outFile << "Total: " << totalPpt << endl;

outFile << "Average: " << totalPpt / monthDays << endl;

outFile << "Temperature\n";

outFile << "Maximum: " << curMaxTemp << endl;

outFile << "Minimum: " << curMinTemp << endl;

}

// write summary in file

outFile << "------------------" << endl;

outFile << "Max temp for year: " << yearMaxTemp << " in " << monthName[yearMaxMonth] << endl;

outFile << "Min temp for year: " << yearMinTemp << " in " << monthName[yearMinMonth] << endl;

outFile << "Max precip for year: " << yearMaxPpt << " in " << monthName[yearMaxPptMonth] << endl;

outFile.close();

return 0;

}

Sample run:

Sample in file:

Sample out file: