Update README.md

README.md

@@ -2,3 +2,32 @@ md5
 ===
 
 Class to create MD5 checksum from file or string
+
+<b>Example</b>
+
+```c++
+
+#include "md5/md5.h"
+
+int main(int argc,char** argv){
+
+  char cstring[] = "To jest testowy string";
+	std::string str = "Bla, to jest test :)";
+
+  /* MD5 from std::string */
+  printf("md5sum: %s\n",  md5sum(  str ).c_str());
+  
+  /* MD5 from c-string */
+  printf("md5sum: %s\n",  md5sum(  cstring ).c_str());
+  
+  /* MD5 from filename */
+  printf("md5file: %s\n", md5file("README.md").c_str());
+  
+  /* Short MD5 from c-string */
+  printf("md5sum6: %s\n", md5sum6( cstring ).c_str());
+
+	/* we're done */
+	return EXIT_SUCCESS;
+}
+
+```