diff --git a/src/c/a5/addsub.asm b/src/c/a5/addsub.asm
index 5057f2d..c6bf74e 100644
--- a/src/c/a5/addsub.asm
+++ b/src/c/a5/addsub.asm
@@ -7,27 +7,23 @@ addsub:
     push ebp
     mov ebp, esp
 
-    mov eax, 0
-    sub esp, 4
-
-    mov [ebp-4], word 1
+    push bx
 
     mov eax, 0
 
-    mov [operation], word [ebp+16]
+    mov bx, word [ebp+16];Operation
+    mov ax, word [ebp+8];op1
 
-    add ax, word [ebp+8]
-
-    cmp [operation], 0x2b
+    cmp bx, 0x2b
     jne substract
 
-    add ax, word [ebp-12]
+    add ax, word [ebp+12];op2
     jmp return
 
-substract: sub ax, word [ebp-12]
+substract: sub ax, word [ebp+12];op2
 
 return:
-
+    pop bx
     mov esp, ebp
     pop ebp
     ret
diff --git a/src/c/a5/flagtest.c b/src/c/a5/flagtest.c
index 1657ff9..ec206ec 100644
--- a/src/c/a5/flagtest.c
+++ b/src/c/a5/flagtest.c
@@ -18,7 +18,9 @@ int main(int argc, char **argv) {
 
     int result = addsub(op1, op2, what, flags);
 
+
     printf("%d\n", result);
+    printf("%u\n", result);
 
     return 0;
 }
\ No newline at end of file