51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// sumafile.cpp -- functions with an array argument
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#include <iostream>
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#include <fstream> // file I/O support
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#include <cstdlib> // support for exit()
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const int SIZE = 60;
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int main()
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{
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using namespace std;
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char filename[SIZE];
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ifstream inFile; // object for handling file input
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cout << "Enter name of data file: ";
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cin.getline(filename, SIZE);
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inFile.open(filename); // associate inFile with a file
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if (!inFile.is_open()) // failed to open file
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{
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cout << "Could not open the file " << filename << endl;
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cout << "Program terminating.\n";
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// cin.get(); // keep window open
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exit(EXIT_FAILURE);
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}
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double value;
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double sum = 0.0;
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int count = 0; // number of items read
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inFile >> value; // get first value
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while (inFile.good()) // while input good and not at EOF
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{
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++count; // one more item read
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sum += value; // calculate running total
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inFile >> value; // get next value
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}
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if (inFile.eof())
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cout << "End of file reached.\n";
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else if (inFile.fail())
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cout << "Input terminated by data mismatch.\n";
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else
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cout << "Input terminated for unknown reason.\n";
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if (count == 0)
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cout << "No data processed.\n";
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else
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{
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cout << "Items read: " << count << endl;
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cout << "Sum: " << sum << endl;
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cout << "Average: " << sum / count << endl;
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}
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inFile.close(); // finished with the file
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// cin.get();
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return 0;
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}
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