Question

I have written some code that count the number of “if” statements from unknown number of files. How can i keep a count for each file separate and a total of “if” from all files?

code:

import java.io.*;

public class ifCounter4 
{
    public static void main(String[] args) throws IOException
    {
        // variable to keep track of number of if's
        int ifCount = 0;

        for (int c = 0; c < args.length; c++)
        {
            // parameter the TA will pass in
            String fileName = args[c];

            // create a new BufferReader
            BufferedReader reader = new BufferedReader( new FileReader (fileName));
            String line  = null;
            StringBuilder stringBuilder = new StringBuilder();
            String ls = System.getProperty("line.separator");

            // read from the text file
            while (( line = reader.readLine()) != null) 
            {
                stringBuilder.append(line);
                stringBuilder.append(ls);
            }

            // create a new string with stringBuilder data
            String tempString = stringBuilder.toString();

            // create one last string to look for our valid if(s) in
            // with ALL whitespace removed
            String compareString = tempString.replaceAll("\\s","");

            // check for valid if(s)
            for (int i = 0; i < compareString.length(); i++)
            {
                if (compareString.charAt(i) == ';' || compareString.charAt(i) == '}' || compareString.charAt(i) == '{') // added opening "{" for nested ifs :)
                {
                    i++;

                    if (compareString.charAt(i) == 'i')
                    {
                        i++;

                        if (compareString.charAt(i) == 'f')
                        {
                            i++;

                            if (compareString.charAt(i) == '(')
                                ifCount++;
                        } // end if
                    } // end if
                } // end if

            } // end for

         // print the number of valid "if(s) with a new line after"
         System.out.println(ifCount + " " + args[c]);  // <-- this keeps running total
                                                       // but not count for each file
        }

        System.out.println(); 

    } // end main
} // end class 

Answer 1

Using an array would solve this problem.

int[] ifCount = new int[args.length];
and then in your loop ifCount[c]++;