Question

C++

COVID-19 has hit US hard. All states and US territories are reporting total cases, new cases, total deaths, new deaths, and active cases. Create a program that will

• read in all states and US territories from a text file into an array using a function
• read each state’s data (a 55 by 4 array) from an example text file (see below) into a two-dimensional array using a function.
• calculate grand total of total cases, new cases, total deaths, and new deaths for all states using a function (or several functions).
• display each state’s statistical data and output to an output text file (I am not interested in your files, I am just interested in the programming part).

Example text file includes:

130689  7671    4758    599     112565
41090   3585    1003    86      39995
15718   0       617     0       15032
15240   203     351     4       13989
14867   1857    512     35      14305
13324   974     236     15      12988
12980   1470    162     12      12742
12500   0       231     0       12259
11256   0       274     0       10932
7984    0       338     0       7022
7314    572     229     10      7054
7276    231     140     7       6461
5675    0       189     0       5436
4950    0       140     0       4770
4944    533     139     12      4791
4450    407     142     23      4308
4045    436     91      24      3770
3633    0       44      0       3294
2901    238     42      4       2773
2878    241     54      3       2822
2456    187     65      1       2371
2440    173     77      9       2361
2367    0       52      3       2303
2049    0       44      0       2005
1953    117     46      0       1871
1927    86      47      2       1860
1738    100     51      8       1687
1605    0       8       0       1586
1327    75      51      5       893
1101    0       10      0       1091
1097    99      24      2       815
1068    0       27      0       1041
986     51      30      1       486
955     0       45      0       604
946     78      25      3       853
922     0       25      0       887
854     17      16      0       741
845     98      25      3       820
673     0       14      0       588
669     0       9       0       513
624     0       12      0       558
543     31      23      1       520
499     29      10      0       331
409     46      8       0       401
371     0       4       0       282
345     21      4       1       341
299     1       6       0       261
288     48      4       0       193
225     18      3       0       148
210     10      0       0       158
185     0       6       0       164
112     0       4       0       85
8       0       1       0       7
513     38      21      1       488
42      0       1       0       7

Answer 1

Code:

Code as text:

#include <iostream>
#include <fstream>

using namespace std;
#define ROW 55
#define COL 4

// function to read data from a text file into an array
void read_data(int data[][COL]) {
// ask for file name and open
ifstream file;
string filename;
cout << "Enter filename: ";
cin >> filename;
file.open(filename);

// print error if file not found
if (!file) {
cout << "Error. File not found.\n";
exit(1);
}

// read data of each state form file into the 2d array
int total_case, new_case, total_death, new_death, active_cases;
int i = 0;
while (file >> total_case >> new_case >> total_death >> new_death >> active_cases) {
data[i][0] = total_case;
data[i][1] = new_case;
data[i][2] = total_death;
data[i][3] = new_death;
i++;
}
// close the file
file.close();
}

// function to calculate the grand total of data
void calculate_total(int data[][COL]) {
int grand_total_cases = 0, grand_new_cases = 0, grand_total_deaths = 0, grand_new_deaths = 0;

// loop for each state and calculate total
for (int i = 0; i < ROW; i++) {
grand_total_cases += data[i][0];
grand_new_cases += data[i][1];
grand_total_deaths += data[i][2];
grand_new_deaths += data[i][3];
}
// open output file
ofstream file("output.txt");

// print grand total and also write to file
cout << "Grand total of total cases: " << grand_total_cases << endl;
file << "Grand total of total cases: " << grand_total_cases << endl;
cout << "Grand total of new cases: " << grand_new_cases << endl;
file << "Grand total of new cases: " << grand_new_cases << endl;
cout << "Grand total of total deaths: " << grand_total_deaths << endl;
file << "Grand total of total deaths: " << grand_total_deaths << endl;
cout << "Grand total of new deathnew deaths: " << grand_new_deaths << endl;
file << "Grand total of new deathnew deaths: " << grand_new_deaths << endl;
// close the file
file.close();
cout << "Data written to file: output.txt" << endl;
}
  
int main() {
// declare 2d array to store data
int data[ROW][COL];
// call function to read data from file
read_data(data);
// call function to calculate the total
calculate_total(data);
return 0;
}

Sample run:

data.txt file:

Run program:

Output file: