diff --git a/1.cpp b/1.cpp
index fedde2c..4b4c4b1 100644
--- a/1.cpp
+++ b/1.cpp
@@ -4,7 +4,7 @@
 
 using namespace std;
 
-long long *b;
+long long* b;
 
 long long int factorial(int n)
 {
@@ -13,20 +13,20 @@ long long int factorial(int n)
 
 long long int *producingTheFactorialFractions()
 {
-    long long b[10];
-
-	for (int i = 10; i >= 0; i--)
+    long long* b;
+	long long* b = new long long[10];
+	for (int i = 10-1; i >= 0; i--)
 	{
-		b[i] += (int)pow(factorial(10), 2.0) / (i + 1);
+		b[i] = (long long int)pow(factorial(10), 2.0) / (i + 1);
 	}
 	return b;
 }
 
-void checkZeros(long long *a)
+void checkZeros(long long int* a)
 {
 	for (int i = 9; i >= 0; i--)
 	{
-		if (a[i] = 0)
+		if (a[i] == 0)
 			cout << "Zero Found" << endl;
 	}
 }
@@ -43,7 +43,7 @@ int main()
 	}
 	delete a;
 
-	cout<<"hello";
+	cout<<"hello"<<endl;
 	cout<<"Bye";
 
 
diff --git a/2.cpp b/2.cpp
index 6a27746..0ebfb97 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;
+    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..24e0b45 100644
--- a/3.cpp
+++ b/3.cpp
@@ -3,20 +3,24 @@
 #define MAX_SIZE 200
 int arr[MAX_SIZE];
 
-typedef struct alfa * alfaptr;
+typedef struct alfa* alfaptr;
 
 struct alfa {
-	long long x;
+	long long int x;
 	alfaptr next;
 };
 alfaptr rear = NULL, front = NULL;
-void push(int x)
+void push(long long int x)
 {
 	alfaptr node;
 	node = (alfaptr)malloc(sizeof(struct alfa));
 	node->x = x;
 	if (!front)
+	{
 		front = node;
+		front->next=NULL;
+		rear = node;
+	}
 	else {
 		rear->next = node;
 		rear = node;
@@ -27,33 +31,39 @@ void pop()
 {
 	alfaptr node;
 	if (!front)
-		printf("ERROR1");
+		printf("ERROR1!\n");
 	else
 	{
 		node = front->next;
 		front = node;
 	}
 }
-void search(int x)
+void search(long long int x)
 {
 	alfaptr node = front;
 	int counter = 0;
-	while (node)
+	int flag = 0;
+	while (node!=NULL)
+	{
 		if (node->x == x)
+		{
 			printf("%d", counter);
-		else {
-			printf("ERROR2");
+			flag = 1;
 			break;
 		}
 		node = node->next;
+	}
+	if (flag == 0)
+		printf("ERROR2\n");
 }
 
 void rpop() {//pop last element
 	alfaptr node = front;
-	while (node)
+	while (node->next->next!=NULL)
 		node = node->next;
-	free(rear);
-	rear = node;
+	alfaptr temp = node->next;
+	node->next = NULL;
+	free(temp);
 }
 
 void set()
@@ -66,9 +76,12 @@ void set()
 int size()
 {
 	alfaptr node = front;
-	int count;
+	int count = 0;
 	while (node)
-		count++;node = node->next;
+	{
+		count++;
+		node = node->next;
+	}
 	return count;
 }
 
@@ -80,24 +93,23 @@ void show()
 	}
 	else
 	{
-		printf("ERROR3");
+		printf("ERROR3\n");
 	}
 }
 
-int average()
+float average()
 {
-
 	alfaptr node = front;
-	int sum = 0, count;
+	int sum = 0, count = 0;
 	while (node) {
 		sum += node->x;
 		count++;
 		node = node->next;
 	}
-	return sum / count;
+	return (float)sum / count;
 }
 
-void main()
+int main()
 {
 	int cmd;
 	long long int x;
diff --git a/4.cpp b/4.cpp
index a9a32f2..5ad825b 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);
+    //Output is 78.0000
     return 0;
 }
\ No newline at end of file
diff --git a/5.cpp b/5.cpp
index 1be3d10..bb6332c 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));
+    //Out put is 20 \n 5
     return 0;
 }
\ No newline at end of file
diff --git a/6.cpp b/6.cpp
index f8b3141..d8f21a0 100644
--- a/6.cpp
+++ b/6.cpp
@@ -7,5 +7,6 @@ int main()
 	a = 512;
 	x[0] = 1;
 	printf("%d\n", a);
+	//Output is 513
 	return 0;
 }
diff --git a/7.cpp b/7.cpp
index 7b065a0..5f5fe9b 100644
--- a/7.cpp
+++ b/7.cpp
@@ -6,5 +6,6 @@ int main()
 	++*p;
 	p += 2;
 	printf("%d", *p);
+	//Output is a number it is 3
 	return 0;
 }
\ No newline at end of file
diff --git a/7.exe b/7.exe
new file mode 100644
index 0000000..072f561
Binary files /dev/null and b/7.exe differ
diff --git a/8.cpp b/8.cpp
index ac3d613..8b6af64 100644
--- a/8.cpp
+++ b/8.cpp
@@ -7,7 +7,6 @@ int main() {
 	const char * str[] = { "Wish","You","Best",":D" };
 	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));
-
-
-	
+	//this code is OK.Output is Be WooW
+	return 0;	
 }