fileio1.cpp

Code

/*
    fileio1.cpp
    David Klick
    CIS 250
    2005-01-31

    Demonstration of simple text file I/O
*/
#include <fstream>
#include <iostream>
using std::cout;
using std::endl;
using std::ifstream;
using std::ofstream;

int main(void) {
    int n;
    float x = 0.0f;

    // open output file
    ofstream ofile("testfileio1.txt");
    if (!ofile) {
        cout << "Error: couldn't open output file" << endl;
        return 1;
    }

    // write out 10 records of two space separated fields
    for (n=1; n<10; n++, x+=25) {
        ofile << n << " " << x << endl;
    }
    ofile.close();

    // open input file
    ifstream ifile("testfileio1.txt");
    if (!ifile) {
        cout << "Error: couldn't open input file" << endl;
        return 2;
    }

    // use priming read to read all records in file
    ifile >> n >> x;
    while (ifile) {
        cout << n << ", " << x << endl;
        ifile >> n >> x;
    }
    ifile.close();

    return 0;
}