SOURCE FILE: notequal.cpp

//******************************************************************
// NotEqualCount program
// This program counts the occurrences of "!=" in a data file
//******************************************************************
#include <iostream>
#include <fstream>    // For file I/O

using namespace std;

int main()
{
    int	     count;	    // Number of != operators
    char     prevChar;	    // Last character read
    char     currChar;	    // Character read in this loop iteration
    ifstream inFile;	    // Data file

    inFile.open("myfile.dat");	       // Attempt to open input file
    if ( !inFile )		       // Was it opened?
    {
	cout << "** Can't open input file **"  // No--print message
	     << endl;
	return 1;			       // Terminate program
    }
    count = 0;			// Initialize counter
    inFile.get(prevChar);	// Initialize previous value
    inFile.get(currChar);	// Initialize current value
    while (inFile)		// While previous input succeeded...
    {
	if (currChar == '=' &&	// Test for event
	    prevChar == '!')
	    count++;		// Increment counter
	prevChar = currChar;	// Replace previous value
				//   with current value
	inFile.get(currChar);	// Get next value
    }
    cout << count << " != operators were found." << endl;
    return 0;
}