add an example for commandline arguments

Add a file demonstrating how to get and use commandline arguments. This is useful in systemc as it can be used to configure
a simulation session, making the implementation more generic.

Author: Muriukidavid

test_argv.cc

@@ -0,0 +1,13 @@
+#include<iostream>
+#include<cstdlib>
+
+using namespace std;
+
+int main(int argc, char* argv[]){
+	int a=0;
+	cout<<"value of argc: "<<argc<<"\n";
+	cout<<"the value of argv[0]: "<<argv[0]<<"\n";
+	cout<<"the value of argv[1]: "<<argv[1]<<"\n";
+	a=atoi(argv[1]);	
+	return 0;
+}