diff --git a/.DS_Store b/.DS_Store
index e0d8cda..f2f8171 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/1_funzioni/readme b/1_funzioni/readme
new file mode 100644
index 0000000..7e1f310
--- /dev/null
+++ b/1_funzioni/readme
@@ -0,0 +1,3 @@
+esegui calcola aggiungendo due numeri 
+
+calcola 1 4
diff --git a/2.little_big_endian/check_architecture b/2.little_big_endian/check_architecture
new file mode 100755
index 0000000..34edced
Binary files /dev/null and b/2.little_big_endian/check_architecture differ
diff --git a/2.little_big_endian/check_architecture.c b/2.little_big_endian/check_architecture.c
new file mode 100644
index 0000000..2b23f43
--- /dev/null
+++ b/2.little_big_endian/check_architecture.c
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef union  {
+     short data_short;
+     char data_char[2];
+
+} input_data;
+
+
+
+
+int main (int index, char** data){
+     
+     
+     
+
+	if (index >2 || index == 1){
+		fprintf(stdout,"More or less arguments expected\n");
+		exit(-1);
+	}else{
+		if ( *((*(data+1))+1) != 0 && *((*(data+1))+2) != 0 && *((*(data+1))+3) != 0 && *((*(data+1))+4) == 0){
+                        input_data data_union;
+                        input_data data_union_inverted;
+			for (int i = 0;i<4;i++){
+				if( ((*((*(data+1))+i) >= 48) &&  (*((*(data+1))+i) <=57) ) || ((*((*(data+1))+i) >= 97) &&  (*((*(data+1))+i) <=102) )){
+                                     continue;
+                                   }else{
+                                        fprintf(stdout,"Bad Formatted\n");
+                                        exit(-2);
+                                   }	
+				
+			}
+                        char buf[3];
+                        for (int i = 0;i<2;i++){
+				buf[0]= *((*(data+1))+(i*2));
+                                buf[1]= *((*(data+1))+(i*2)+1);
+                                buf[2]= 0;
+                                
+                                sscanf (buf,"%hx",(short *)&(data_union.data_char[i]));
+                                data_union_inverted.data_char[1-i] = data_union.data_char[i] ;
+                                
+				
+			}
+
+
+                        for (int i = 0;i<2;i++){
+                         fprintf(stdout,"0x%02x\n",data_union.data_char[i]);
+                        }
+                        
+                        fprintf(stdout,"Big Endian %d\n",data_union.data_short);
+                        fprintf(stdout,"Little Endian %d\n",data_union_inverted.data_short);
+                        
+                        
+
+
+		}else{
+			fprintf(stdout,"Bad Input Lenght\n");
+		}
+	
+	}	
+
+
+
+
+return 0;
+}
diff --git a/2.little_big_endian/my_architecture b/2.little_big_endian/my_architecture
new file mode 100755
index 0000000..bff858d
Binary files /dev/null and b/2.little_big_endian/my_architecture differ
diff --git a/2.little_big_endian/my_architecture.c b/2.little_big_endian/my_architecture.c
new file mode 100644
index 0000000..603d8f5
--- /dev/null
+++ b/2.little_big_endian/my_architecture.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+
+int main (int index, char** in_data){
+     
+     short data = 0x0102;
+     char* datacp = (char*)&data;
+     if (*datacp == 0x01 && *(datacp+1)==0x02){
+          printf("Big Endian\n");
+     }else{
+          if(*datacp == 0x02 && *(datacp+1)==0x01){
+               printf("Little Endian\n");    
+          }else{
+               printf("Unknow\n");
+          }
+     }
+     
+     
+     return 0;
+}
\ No newline at end of file
diff --git a/2.little_big_endian/readme.txt b/2.little_big_endian/readme.txt
new file mode 100644
index 0000000..e27e163
--- /dev/null
+++ b/2.little_big_endian/readme.txt
@@ -0,0 +1,3 @@
+utility_check _size mostra la grandezza in byte dei divers tipi di dato
+check_architecture legge come parametro da lien di comando 4 cifre esadecimali e ne restituisce il valore in little e big endian
+my_architecture mostra l'archiettura corrente
\ No newline at end of file
diff --git a/2.little_big_endian/utility_check_size b/2.little_big_endian/utility_check_size
new file mode 100755
index 0000000..ded1fc0
Binary files /dev/null and b/2.little_big_endian/utility_check_size differ
diff --git a/2.little_big_endian/utility_check_size.c b/2.little_big_endian/utility_check_size.c
new file mode 100644
index 0000000..45cb0cf
--- /dev/null
+++ b/2.little_big_endian/utility_check_size.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int main (int size, char** data){
+fprintf (stdout, "Char: %lu byte\n",sizeof(char));
+fprintf (stdout, "Short: %lu byte\n",sizeof(short));
+fprintf (stdout, "Int: %lu byte\n",sizeof(int));
+fprintf (stdout, "Long: %lu byte\n",sizeof(long));
+return 0;
+
+}
diff --git a/da_vedere b/da_vedere
new file mode 100644
index 0000000..c40d1d3
--- /dev/null
+++ b/da_vedere
@@ -0,0 +1,13 @@
+nel make file
+@echo compilazione di $< in $@
+
+FLAG1= -c
+
+FLAG2 = -o
+
+
+
+clear:
+	rm -f -- per esempio
+
+vedi union, esercizi stringa, file, little e bigendian, dati esadecimali.
diff --git a/test/test b/test/test
new file mode 100755
index 0000000..ea20455
Binary files /dev/null and b/test/test differ
diff --git a/test/test.c b/test/test.c
new file mode 100644
index 0000000..a79ae0a
--- /dev/null
+++ b/test/test.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+
+int main (int index, char** in_data){
+     
+     char buf[50];
+     fscanf(stdin,"%10[^\n]",buf);
+     fprintf(stdout,"%s",buf);
+     
+     
+     return 0;
+}
\ No newline at end of file