diff --git a/1.cpp b/1.cpp
index fedde2c..9397ac0 100644
--- a/1.cpp
+++ b/1.cpp
@@ -13,20 +13,20 @@ long long int factorial(int n)
 
 long long int *producingTheFactorialFractions()
 {
-    long long b[10];
+    long long *b[10];
 
-	for (int i = 10; i >= 0; i--)
+	for (int i = 9; i >= 0; i--)
 	{
 		b[i] += (int)pow(factorial(10), 2.0) / (i + 1);
 	}
-	return b;
+	return *b;
 }
 
 void checkZeros(long long *a)
 {
 	for (int i = 9; i >= 0; i--)
 	{
-		if (a[i] = 0)
+		if (a[i] == 0)
 			cout << "Zero Found" << endl;
 	}
 }
@@ -46,5 +46,5 @@ int main()
 	cout<<"hello";
 	cout<<"Bye";
 
-
+	return 0;
 }
\ No newline at end of file
diff --git a/2.cpp b/2.cpp
index 6a27746..23cea79 100644
--- a/2.cpp
+++ b/2.cpp
@@ -5,11 +5,11 @@ using namespace std;
 
 // count all the specific char in the whole array of strings
 int countAllSpecificChars(string sArr[], int arrLength, char specificChar) {
-    int count;
-    for (int i = 0; i <= arrLength; ++i)
-        for (int j = 0; j <= sArr[i].size(); ++j)
+    int count = 0;
+    for (int i = 0; i < arrLength; ++i)
+        for (int j = 0; j < sArr[i].size(); ++j)
             // if the jth char of the string is the specific char
-            if (sArr[i][j] = specificChar)
+            if (sArr[i][j] == specificChar)
                 count++;
     return count;
 }
diff --git a/3.cpp b/3.cpp
index 77eb722..e525c50 100644
--- a/3.cpp
+++ b/3.cpp
@@ -16,10 +16,22 @@ void push(int x)
 	node = (alfaptr)malloc(sizeof(struct alfa));
 	node->x = x;
 	if (!front)
+	{
 		front = node;
+		front->next = NULL;
+	}
+	
 	else {
-		rear->next = node;
 		rear = node;
+		rear->next = NULL;
+		if (front->next == NULL)
+			front->next = rear;
+		else {
+			alfaptr temp = front;
+			while (temp->next != NULL)
+				temp = temp->next;
+			temp->next = rear;
+		}
 	}
 }
 
@@ -27,7 +39,7 @@ void pop()
 {
 	alfaptr node;
 	if (!front)
-		printf("ERROR1");
+		printf("%s", "ERROR1");
 	else
 	{
 		node = front->next;
@@ -39,56 +51,73 @@ void search(int x)
 	alfaptr node = front;
 	int counter = 0;
 	while (node)
+	{
 		if (node->x == x)
+		{
 			printf("%d", counter);
-		else {
-			printf("ERROR2");
 			break;
 		}
+		else {
+			printf("%s", "ERROR2");
+		}
 		node = node->next;
+	}
 }
 
 void rpop() {//pop last element
 	alfaptr node = front;
-	while (node)
+	while (node->next->next != NULL)
 		node = node->next;
 	free(rear);
 	rear = node;
+	rear->next = NULL;
 }
 
 void set()
 {
 	alfaptr node = front;
-	for (int i = 0; i < MAX_SIZE && node; i++, node = node->next)
+	for (int i = 0; i < MAX_SIZE; i++)
+		arr[i] = node->x;
+	node = front;
+	
+	for (int i = 0; i < MAX_SIZE && node; i++)
+	{
 		arr[i] = node->x;
+		node = node->next;
+	}
 }
 
 int size()
 {
 	alfaptr node = front;
-	int count;
+	int count = 0;
 	while (node)
-		count++;node = node->next;
+	{
+		count++;
+		node = node->next;
+	}
+
 	return count;
 }
 
 void show()
 {
-	if (!front) {
+	if (front) {
 		for (int i = 0; i < MAX_SIZE; i++)
 			printf("%d ", arr[i]);
 	}
 	else
 	{
-		printf("ERROR3");
+		printf("%s", "ERROR3");
 	}
+	printf("\n");
 }
 
 int average()
 {
 
 	alfaptr node = front;
-	int sum = 0, count;
+	int sum = 0, count = 0;
 	while (node) {
 		sum += node->x;
 		count++;
@@ -97,7 +126,7 @@ int average()
 	return sum / count;
 }
 
-void main()
+int main()
 {
 	int cmd;
 	long long int x;
@@ -127,10 +156,11 @@ void main()
 			show();
 			break;
 		case 7://size
-			printf("%d", size());
+			printf("%d\n", size());
 			break;
 		case 10:
 			exit(0);
 		}
 	}
+	return 0;
 }
\ No newline at end of file
diff --git a/4.cpp b/4.cpp
index a9a32f2..ec33abb 100644
--- a/4.cpp
+++ b/4.cpp
@@ -5,5 +5,6 @@ int main()
     float *ptr1 = &arr[0];
     float *ptr2 = ptr1 + 3;
     printf("%f", *ptr2 - *ptr1);
+    // result of the run: 90.5 - 12.5 = 78.0000
     return 0;
 }
\ No newline at end of file
diff --git a/5.cpp b/5.cpp
index 1be3d10..d58984a 100644
--- a/5.cpp
+++ b/5.cpp
@@ -6,5 +6,6 @@ int main()
     int *ptr2 = arr + 5;
     printf("%d\n", (*ptr2 - *ptr1));
     printf("%c", (char)(*ptr2 - *ptr1));
+    // result of the run: line 7 = 50  ,  line 8 = 2 (ascii code for number 2 is 50)
     return 0;
 }
\ No newline at end of file
diff --git a/6.cpp b/6.cpp
index f8b3141..f3bd900 100644
--- a/6.cpp
+++ b/6.cpp
@@ -7,5 +7,6 @@ int main()
 	a = 512;
 	x[0] = 1;
 	printf("%d\n", a);
+	// result of the run: 513
 	return 0;
 }
diff --git a/7.cpp b/7.cpp
index 7b065a0..50398b5 100644
--- a/7.cpp
+++ b/7.cpp
@@ -6,5 +6,7 @@ int main()
 	++*p;
 	p += 2;
 	printf("%d", *p);
+	/* result of the run: 3 because line 7 will change the part that pointer is pointing to
+	the third data of the array which is 3 */
 	return 0;
 }
\ No newline at end of file
diff --git a/8.cpp b/8.cpp
index ac3d613..2c0fc30 100644
--- a/8.cpp
+++ b/8.cpp
@@ -8,6 +8,6 @@ int main() {
 	printf("%c%c ", *f(str), *(f(str) + 1));
 	printf("%c%c%c%c\n", **str, *(*(str + 1) + 1), *((str + 2)[-1] + 1), **&*(&str[-1] + 1));
 
-
-	
+	// the result of the run: line 8 = Be  , line 9 = WooW
+	return 0;
 }