Edited - 1 - All

.vscode/tasks.json

@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++.exe build active file",
+            "command": "C:\\msys64\\mingw64\\bin\\g++.exe",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

1.cpp

@@ -2,39 +2,36 @@
 using namespace std;
 
 class container {
-
-	int size;
+    int size;
+    float* p;
 public:
-	float* p;
-	container(int s) :size(s){}
-	const int& getsize() { return size;}
-
+    container(int s) : size(s), p(new float[s]) {}
+    
+    int& getsize() { return size; }
+    ~container() { delete[] p; }
 };
 
-class vector :public container {
-
-	int call_num;
+class vector : public container {
+    mutable int call_num;
 public:
-	explicit vector(int l) :len(l),size(1 * 100){
-		p = new float();
-	}
-	int len;
-	int& getlen() const {
-		call_num ++;
-		return len;
-	}
-	~vector() = default;
+    int len;
+    explicit vector(int l) : container(100), len(l), call_num(0) {}
+    int& getlen() {
+        call_num++;
+        return len;
+    }
+    ~vector() = default;
 };
 
 int main() {
-
-	container c1(100);
-	vector v1 = c1;
-	container& r1 = v1;
-	container c2 = 100;
-	c2.getsize() = 20;
-	cout << c2.getsize();
-	vector v2 = 100;
-	v2.getlen = 40;
-	cout << v2.getlen();
-}
+    container c1(100);
+    vector v1(100);
+    container& r1 = v1;
+    container c2(100);
+    c2.getsize() = 20;
+    cout << c2.getsize();
+    vector v2(100);
+    v2.getlen() = 40;
+    cout << v2.getlen();
+    return 0;
+}

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;
 }

3.cpp

@@ -45,15 +45,33 @@ void search(int x)
 			printf("ERROR2");
 			break;
 		}
+		counter ++;
 		node = node->next;
 }
 
 void rpop() {//pop last element
+	if(!front)
+	{
+		return ;
+	}
 	alfaptr node = front;
-	while (node)
+	alfaptr prev_node = NULL;
+	while (node->next)
+	{
+		prev_node = node;
 		node = node->next;
-	free(rear);
-	rear = node;
+	}
+	if(prev_node)
+	{
+		prev_node->next = NULL;
+	}
+	else
+	{
+		front = NULL;
+		free(node);
+		rear = prev_node;
+	}
+
 }
 
 void set()
@@ -66,7 +84,7 @@ void set()
 int size()
 {
 	alfaptr node = front;
-	int count;
+	int count = 0;
 	while (node)
 		count++;node = node->next;
 	return count;
@@ -86,14 +104,17 @@ void show()
 
 int average()
 {
-
 	alfaptr node = front;
-	int sum = 0, count;
+	int sum = 0, count = 0;
 	while (node) {
 		sum += node->x;
 		count++;
 		node = node->next;
 	}
+	if(count == 0)
+	{
+		return 0;
+	}
 	return sum / count;
 }
 

4.cpp

@@ -6,4 +6,7 @@ int main()
     float *ptr2 = ptr1 + 3;
     printf("%f", *ptr2 - *ptr1);
     return 0;
-}
+}
+
+
+// 78

5.cpp

@@ -7,4 +7,15 @@ int main()
     printf("%d\n", (*ptr2 - *ptr1));
     printf("%c", (char)(*ptr2 - *ptr1));
     return 0;
-}
+}
+
+//کد مشکلی نداره ولی اگر بخوایم خط اخر کاراکتر چاپ کنه باید اینجوری بنویسیم
+//علت اینکه در نسخه اصلی عدد چاپ می شود این است که ما کد اسکی را با کست کردن به کاراکتر خواهیم داشت و نه خود حرف را
+
+// printf("%c", (*ptr2 - *ptr1) + 'a');
+
+// خروجی حالت اصلی 
+// 50 - 2 
+
+// خروجی حالت فرعی
+// 50 - p

6.cpp

@@ -2,10 +2,12 @@
 int main()
 {
 	int a;
-	char *x;
-	x = (char *)&a;
+	unsigned char *x;
+	x = (unsigned char *)&a;
 	a = 512;
 	x[0] = 1;
 	printf("%d\n", a);
 	return 0;
 }
+
+//513

7.cpp

@@ -7,4 +7,6 @@ int main()
 	p += 2;
 	printf("%d", *p);
 	return 0;
-}
+}
+
+//3

8.cpp

@@ -1,13 +1,11 @@
 #include<stdio.h>
 const char * f(const char **p) {
-	auto q = (p + sizeof(char))[1];
+	auto q = *(p + 1);
 	return q;
 }
 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[0], *(str[1] + 1) , *((str + 2) + 1), **(str - 1 + 4));
 
 }