diff --git a/src/simulator/mem_cmp.rs b/src/simulator/mem_cmp.rs
index abddae9..c8436a3 100644
--- a/src/simulator/mem_cmp.rs
+++ b/src/simulator/mem_cmp.rs
@@ -82,7 +82,7 @@ impl Section{
 /*
 * Representation de l'etat de la mémoire (apres execution.... a  confirmer), sous forme de sections
 */
-struct Mem_Checker{
+pub struct Mem_Checker{
     pc: usize,
     sp: usize,
     sections: Vec<Section>,
@@ -91,10 +91,13 @@ struct Mem_Checker{
 
 impl Mem_Checker{
 
-    fn from(path: &String) -> Mem_Checker {
+    pub fn from(path: &String) -> Mem_Checker {
 
         let file = fs::File::open("test_file_section.txt").expect("Wrong filename");
-        let reader = io::BufReader::new(file);
+        let reader = io::BufReader::new(&file);
+        let reader2 = io::BufReader::new(&file);
+        let lines = reader.lines();
+        let length = reader2.lines().count();
 
         let mut pc: usize = 0;
         let mut sp: usize = 0;
@@ -103,15 +106,15 @@ impl Mem_Checker{
         let mut tmp_addr_str: String = String::new();
         let mut tmp_len_str: String = String::new();
 
-        for (i,line) in reader.lines().enumerate() {
+        for (i,line) in lines.enumerate() {
 
             let current_line = line.unwrap();
 
-            if i == current_line.len()-2 {
+            if i == length-2 {
                 //Lecture de PC
                 pc = string_hex_to_usize(&current_line);
             }
-            else if i == current_line.len()-1 {
+            else if i == length-1 {
                 //Lecture SP
                 sp = string_hex_to_usize(&current_line);
             }
@@ -151,7 +154,7 @@ impl Mem_Checker{
 
     }
 
-    fn fill_memory_from_Mem_Checker(m_c: &Mem_Checker, machine: &mut Machine){
+    pub fn fill_memory_from_Mem_Checker(m_c: &Mem_Checker, machine: &mut Machine){
         
         machine.sp = m_c.sp;
         machine.pc = m_c.pc as u64;
@@ -277,7 +280,6 @@ mod tests {
 
     }
 
-
     #[test]
     fn test_enum_start_at_zero(){
         let v = vec![1,2,3];
diff --git a/test_file_section.txt b/test_file_section.txt
index 05d3ead..df1b0d2 100644
--- a/test_file_section.txt
+++ b/test_file_section.txt
@@ -1,8 +1,15 @@
-0
-0
-FF FF
-F4A12200
-A0 0A
-01022B
-0B 0F
-FFACBC5CEF
+addi    sp,sp,-32
+sd      s0,24(sp)
+addi    s0,sp,32
+sw      zero,-20(s0)
+li      a5,1
+sw      a5,-24(s0)
+lw      a5,-20(s0)
+mv      a4,a5
+lw      a5,-24(s0)
+addw    a5,a4,a5
+sw      a5,-20(s0)
+nop
+ld      s0,24(sp)
+addi    sp,sp,32
+ret
\ No newline at end of file
diff --git a/test_programs/riscv_instructions/simple_arithmerics/unsigned_addition.o b/test_programs/riscv_instructions/simple_arithmerics/unsigned_addition.o
new file mode 100644
index 0000000..3d69445
Binary files /dev/null and b/test_programs/riscv_instructions/simple_arithmerics/unsigned_addition.o differ