diff --git a/src/addition.c b/src/addition.c
index a618655..0b864a9 100644
--- a/src/addition.c
+++ b/src/addition.c
@@ -14,6 +14,16 @@ struct data
     unsigned int precision;
 };
 
+struct datad {
+    union {
+        double dnum;
+        unsigned long lnum;
+    } number;
+    unsigned long sign;
+    unsigned long exponent;
+    unsigned long precision;
+};
+
 // full_adder is an implementation of two bit addition with carry
 
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry) {
@@ -99,4 +109,9 @@ float addition_float(float number1, float number2) {
     num3.number.integer = output_float(num1.sign, num3.exponent, num3.precision);
 
     return num3.number.floating;
+}
+
+unsigned long sign_double(unsigned long a) {
+    if (a & 0x8000000000000000 == 0x8000000000000000) return 1;
+    else return 0;
 }
\ No newline at end of file
diff --git a/src/addition.h b/src/addition.h
index 86b202c..89a0297 100644
--- a/src/addition.h
+++ b/src/addition.h
@@ -5,6 +5,8 @@ typedef unsigned int num;
 
 struct data;
 
+struct datad;
+
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry);
 
 unsigned int addition_uint(num number1, num number2);
@@ -21,4 +23,6 @@ unsigned int output_float(unsigned int sign, unsigned int exponent, unsigned int
 
 float addition_float(float number1, float number2);
 
+unsigned long sign_double(unsigned long a);
+
 #endif // ADDITION_H
\ No newline at end of file
diff --git a/test/test_addition.c b/test/test_addition.c
index 66b799d..4190d62 100644
--- a/test/test_addition.c
+++ b/test/test_addition.c
@@ -82,7 +82,7 @@ void test_addition_full_adder_completesumwithcarry(void)
     TEST_ASSERT_EQUAL_UINT(expectedcarry[4], carryresult[4]);
 }
 
-void test_addition_addition_basecasezeropluszeroequalzero(void)
+void test_addition_addition_uint_basecasezeropluszeroequalzero(void)
 {
     unsigned int result;
     unsigned int expected = 0;
@@ -92,7 +92,7 @@ void test_addition_addition_basecasezeropluszeroequalzero(void)
     TEST_ASSERT_EQUAL_UINT(expected, result);
 }
 
-void test_addition_addition_basecaseonescolumns(void)
+void test_addition_addition_uint_basecaseonescolumns(void)
 {
     unsigned int result[2];
     unsigned int expected[2] = { 1, 1 };
@@ -104,7 +104,7 @@ void test_addition_addition_basecaseonescolumns(void)
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
 }
 
-void test_addition_addition_basecasetotenscolumns(void)
+void test_addition_addition_uint_basecasetotenscolumns(void)
 {
     unsigned int result[5];
     unsigned int expected[5] = { 3, 3, 2, 3, 3 };
@@ -122,7 +122,7 @@ void test_addition_addition_basecasetotenscolumns(void)
     TEST_ASSERT_EQUAL_UINT(expected[4], result[4]);
 }
 
-void test_addition_addition_allunsignedinteger(void)
+void test_addition_addition_uint_allunsignedinteger(void)
 {
     unsigned int result[5];
     unsigned int expected[5] = { 88879736, __UINT32_MAX__, 66558, __UINT32_MAX__, 477905879 };
@@ -140,7 +140,7 @@ void test_addition_addition_allunsignedinteger(void)
     TEST_ASSERT_EQUAL_UINT(expected[4], result[4]);
 }
 
-void test_addition_signfloatingnumber(void)
+void test_addition_sign_floatingnumber(void)
 {
     unsigned int result[2];
     unsigned int expected[2] = { 0, 1 };
@@ -153,7 +153,7 @@ void test_addition_signfloatingnumber(void)
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
 }
 
-void test_addition_precisionfloatingnumber(void)
+void test_addition_precision_floatingnumber(void)
 {
     unsigned int result[5];
     number[0].floating = 0, number[1].floating = -34753168, number[2].floating = 75613594, number[3].floating = -0.00000044568721, number[4].floating = 0.0000004796123;
@@ -172,7 +172,7 @@ void test_addition_precisionfloatingnumber(void)
     TEST_ASSERT_EQUAL_UINT(expected[4], result[4]);
 }
 
-void test_addition_exponentfloatingnumber(void)
+void test_addition_exponent_floatingnumber(void)
 {
     unsigned int result[5];
     number[0].floating = 0, number[1].floating = -762134982, number[2].floating = 47621349, number[3].floating = -0.0000078961354, number[4].floating = 0.00001568943;
@@ -191,7 +191,7 @@ void test_addition_exponentfloatingnumber(void)
     TEST_ASSERT_EQUAL_UINT(expected[4], result[4]);
 }
 
-void test_addition_addition_precision_positivnumberlowerthan2tothepowerof24(void)
+void test_addition_addition_precision_float_positivnumberlowerthan2tothepowerof24(void)
 {
     unsigned int result[2];
     number[0].floating = 652468761.2348, number[1].floating = 2.675312546943, number[2].floating = 321647956212.2146, number[3].floating = 0.00000324567861, number[4].floating = number[0].floating + number[1].floating; number[5].floating = number[2].floating + number[3].floating;
@@ -211,7 +211,7 @@ void test_addition_addition_precision_positivnumberlowerthan2tothepowerof24(void
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
 }
 
-void test_addition_output_numberwithsignexponentprecision(void)
+void test_addition_output_float_numberwithsignexponentprecision(void)
 {
     unsigned int result[5];
     number[0].floating = 1468921, number[1].floating = -32468127698, number[2].floating = 0.000000795311468, number[3].floating = -0.00000843214521, number[4].floating = 14;