diff --git a/1.cpp b/1.cpp
index fedde2c..e31276e 100644
--- a/1.cpp
+++ b/1.cpp
@@ -4,29 +4,33 @@
 
 using namespace std;
 
-long long *b;
+long double *b;
 
 long long int factorial(int n)
 {
 	return (n == 1 || n == 0) ? 1 : factorial(n - 1) * n;
 }
 
-long long int *producingTheFactorialFractions()
+long double *producingTheFactorialFractions()
 {
-    long long b[10];
+	// memory allocation
+	b = new long double[10];
 
-	for (int i = 10; i >= 0; i--)
+	// 10 -> 9
+	for (int i = 9; i >= 0; i--)
 	{
-		b[i] += (int)pow(factorial(10), 2.0) / (i + 1);
+		// equal
+		b[i] = (long double)(pow(factorial(10), 2.0) / (i + 1));
 	}
 	return b;
 }
 
-void checkZeros(long long *a)
+void checkZeros(long double *a)
 {
 	for (int i = 9; i >= 0; i--)
 	{
-		if (a[i] = 0)
+		// equality oprator
+		if (a[i] == 0)
 			cout << "Zero Found" << endl;
 	}
 }
@@ -34,7 +38,7 @@ void checkZeros(long long *a)
 int main()
 {
 
-	long long int *a;
+	long double *a;
 	a = producingTheFactorialFractions();
 	checkZeros(a);
 	for (int i = 0; i < 10; i++)
@@ -43,8 +47,20 @@ int main()
 	}
 	delete a;
 
-	cout<<"hello";
-	cout<<"Bye";
+	cout << "hello";
+	cout << "Bye";
+}
 
 
-}
\ No newline at end of file
+//javab
+// 1.31682e+013
+// 6.58409e+012
+// 4.3894e+012
+// 3.29205e+012
+// 2.63364e+012
+// 2.1947e+012
+// 1.88117e+012
+// 1.64602e+012
+// 1.46313e+012
+// 1.31682e+012
+// helloBye
\ No newline at end of file
diff --git a/2.cpp b/2.cpp
index 6a27746..25a4039 100644
--- a/2.cpp
+++ b/2.cpp
@@ -4,23 +4,29 @@
 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)
-            // if the jth char of the string is the specific char
-            if (sArr[i][j] = specificChar)
-                count++;
+int countAllSpecificChars(string sArr[], int arrLength, char specificChar)
+{
+    int count = 0;                      // intial value = 0
+    for (int i = 0; i < arrLength; i++) //< arrlength not eqaul
+    {
+        for (int j = 0; j < sArr[i].size(); j++) //< arrlength not eqaul
+        {                                        // if the jth char of the string is the specific char
+            if (sArr[i][j] == specificChar)      // equality oprator
+            {
+                count += 1;
+            }
+        }
+    }
     return count;
 }
 
-int main() {
+int main()
+{
     string sArr[4] = {
-            "I am",
-            "in",
-            "ap",
-            "class"
-    };
+        "I am",
+        "in",
+        "ap",
+        "class"};
     char findIt;
     cin >> findIt;
     cout << countAllSpecificChars(sArr, 4, findIt);
diff --git a/4.cpp b/4.cpp
index a9a32f2..85ac0d8 100644
--- a/4.cpp
+++ b/4.cpp
@@ -6,4 +6,7 @@ int main()
     float *ptr2 = ptr1 + 3;
     printf("%f", *ptr2 - *ptr1);
     return 0;
-}
\ No newline at end of file
+}
+
+
+//78.000000     90.5 - 12.5
\ No newline at end of file
diff --git a/5.cpp b/5.cpp
index 1be3d10..682b5de 100644
--- a/5.cpp
+++ b/5.cpp
@@ -4,7 +4,9 @@ int main()
     int arr[] = { 10, 20, 30, 40, 50, 60 };
     int *ptr1 = arr;
     int *ptr2 = arr + 5;
-    printf("%d\n", (*ptr2 - *ptr1));
-    printf("%c", (char)(*ptr2 - *ptr1));
+    printf("%d\n", (*ptr2 - *ptr1));            //60-10
+    printf("%c", (char)(*ptr2 - *ptr1));        //عدد اسکی 50
     return 0;
-}
\ No newline at end of file
+}
+//50
+//2
diff --git a/6.cpp b/6.cpp
index f8b3141..cd5c1c3 100644
--- a/6.cpp
+++ b/6.cpp
@@ -6,6 +6,6 @@ int main()
 	x = (char *)&a;
 	a = 512;
 	x[0] = 1;
-	printf("%d\n", a);
+	printf("%d\n", a);	//513
 	return 0;
 }
diff --git a/7.cpp b/7.cpp
index 7b065a0..d609561 100644
--- a/7.cpp
+++ b/7.cpp
@@ -2,9 +2,9 @@
 int main()
 {
 	int arr[] = { 1, 2, 3, 4, 5 };
-	int *p = arr;
-	++*p;
-	p += 2;
-	printf("%d", *p);
+	int *p = arr;		//p = 1
+	++*p;				//p = 2
+	p += 2;				//p = 3
+	printf("%d", *p);	
 	return 0;
 }
\ No newline at end of file
diff --git a/8.cpp b/8.cpp
index ac3d613..3d6a15f 100644
--- a/8.cpp
+++ b/8.cpp
@@ -1,13 +1,12 @@
-#include<stdio.h>
-const char * f(const char **p) {
+#include <stdio.h>
+const char *f(const char **p)
+{
 	auto q = (p + sizeof(char))[1];
 	return q;
 }
-int main() {
-	const char * str[] = { "Wish","You","Best",":D" };
+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));
-
-
-	
+	printf("%c%c%c%c\n", **str, *(*(str + 1) + 1), *((str + 2)[-1] + 1), **&*(&str[-1] + 1)); // Be WooW
 }