Fixed typo in logger

modsim/ass3/logger.c

@@ -16,7 +16,7 @@ void logger(double t, int N, double *y) {
     if( N > 0 ) {
         for( int i = 0; i < N - 1; i++ )
             fprintf(logfile, ",%e", y[0]);
-        fprintf(logfile, "%e\n", y[N-1]);
+        fprintf(logfile, ",%e\n", y[N-1]);
     }
     else
         fprintf(logfile, "\n");