added testMatrix

Simple code to compare the output of two file

testMatrix.c

+#include <iostream>
+#include <fstream>
+#include <string>
+#include <iomanip> 
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+    ifstream myfile(argv[1]);
+    ifstream myfile1(argv[2]);
+    ofstream outfile("res.txt");
+
+    if (myfile.is_open() && myfile1.is_open())
+    {
+        int arrSize = 0;
+        double arr[1001805]; // Ideally this would be a vector, but you said array
+        double arr1[1001805]; // Ideally this would be a vector, but you said array
+        
+        double res[1001805]; // Ideally this would be a vector, but you said array
+
+
+        while ( true)
+        {
+            double x;
+            myfile >> x;
+            if (myfile.eof())
+                break;
+            arr[arrSize++] = x;
+        }
+        
+        arrSize=0;
+        while (true)
+        {
+            double x;
+            myfile1 >> x;
+            if (myfile1.eof())
+                break;
+            arr1[arrSize] = x;
+            
+            res[arrSize]=arr[arrSize]-arr1[arrSize];
+            outfile<<arrSize<<" "<<fixed<<setprecision(20)<< res[arrSize]<<" "<<arr[arrSize]<<" "<<arr1[arrSize]<<"\n";
+            arrSize++;
+        }
+        
+        
+
+        // I should have closed the file here, but as the program was ending I was lazy	}
+    }
+        else
+        {
+            cout << "Unable to open file";
+        }
+    
+    
+    outfile.close();
+    myfile.close();
+    myfile1.close();
+
+        return 0;
+
+}
+