// Header files #include <iostream> #include <fstream> #include <string> using n

Question

// Header files
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

// main function
int main()
{
const int ROWS = 5;
const int COLS = 3;
string filename = "cet124.txt";

// open the file
ifstream infile;
infile.open(filename);
if(!infile)
{
cout << filename << " file cannot be opened." << endl;
system("pause"); // for Visual Studio
exit(EXIT_FAILURE);
}
  
// create the two-dimensional array
int cet124f[ROWS][COLS];
int score;

// read the scores from the file
for(int i = 0; i < ROWS && !infile.eof(); i++)
{
for(int j = 0; j < COLS; j++)
{
// read a scoe
infile >> score;

/* add 5 to score and store the new value into the array */
cet124f[i][j] = score + 5;
}
}

// print the new array of scores
cout << "Array of new scores: " << endl;
for(int i = 0; i < ROWS; i++)
{
for(int j = 0; j < COLS; j++)
{
cout << cet124f[i][j] << " ";
}
cout << endl;
}

// pause the system for a while
system("pause"); // for Visual Studio
return 0;
}

Input file: cet124.txt:
90 89 81
43 72 67
93 99 91
81 88 85
77 95 53

Write a program to reads data from a file named cet124 (90, 89, 81; 43, 72, 67; 93, 99 , 91, 81, 88, 85; 77, 95, 53) adds 5 points to each score and stores values of multiple test scores in a two dimensional array(5 times 3) called cet124f and print out the array in a 5times3 table.

Explanation / Answer

// Header files
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

// main function
int main()
{
const int ROWS = 5;
const int COLS = 3;
string filename = "cet124.txt";

// open the file
ifstream infile;
infile.open(filename);
if(!infile)
{
cout << filename << " file cannot be opened." << endl;
system("pause"); // for Visual Studio
exit(EXIT_FAILURE);
}
  
// create the two-dimensional array
int cet124f[ROWS][COLS];
int score;

// read the scores from the file
for(int i = 0; i < ROWS && !infile.eof(); i++)
{
for(int j = 0; j < COLS; j++)
{
// read a scoe
infile >> score;

/* add 5 to score and store the new value into the array */
cet124f[i][j] = score + 5;
}
}

// print the new array of scores
cout << "Array of new scores: " << endl;
for(int i = 0; i < ROWS; i++)
{
for(int j = 0; j < COLS; j++)
{
cout << cet124f[i][j] << " ";
}
cout << endl;
}

// pause the system for a while
system("pause"); // for Visual Studio
return 0;
}

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