Changed

1.cpp

@@ -6,21 +6,24 @@ class container {
 	int size;
 public:
 	float* p;
-	container(int s) :size(s){}
-	const int& getsize() { return size;}
+	container(int s) :size(s) {
+	}
+	const int& getsize() { 
+		return size;
+	}
 
 };
 
 class vector :public container {
 
 	int call_num;
 public:
-	explicit vector(int l) :len(l),size(1 * 100){
+	explicit vector(int l) :len(l), container(1 * 100) {
 		p = new float();
-	}
+	};
 	int len;
-	int& getlen() const {
-		call_num ++;
+	int& getlen()  {
+		call_num++;
 		return len;
 	}
 	~vector() = default;
@@ -29,12 +32,14 @@ class vector :public container {
 int main() {
 
 	container c1(100);
-	vector v1 = c1;
-	container& r1 = v1;
+	//vector v1 = c1;
+	//container& r1 = v1;
 	container c2 = 100;
-	c2.getsize() = 20;
+	//c2.getsize() = 20;
 	cout << c2.getsize();
-	vector v2 = 100;
-	v2.getlen = 40;
-	cout << v2.getlen();
-}
+	//vector v2 = 100;
+	//v2.getlen = 40;
+	//cout << v2.getlen();
+}
+
+//res : 100

2.cpp

@@ -5,9 +5,9 @@ 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)
                 count++;

4.cpp

@@ -2,8 +2,10 @@
 int main()
 {
     float arr[5] = { 12.5, 10.0, 13.5, 90.5, 0.5 };
-    float *ptr1 = &arr[0];
-    float *ptr2 = ptr1 + 3;
+    float* ptr1 = &arr[0];
+    float* ptr2 = ptr1 + 3;
     printf("%f", *ptr2 - *ptr1);
     return 0;
-}
+}
+//res:
+//78.00000

5.cpp

@@ -1,10 +1,15 @@
-#include<stdio.h>
+
+#include<stdio.h>
 int main()
 {
     int arr[] = { 10, 20, 30, 40, 50, 60 };
-    int *ptr1 = arr;
-    int *ptr2 = arr + 5;
+    int* ptr1 = arr;
+    int* ptr2 = arr + 5;
     printf("%d\n", (*ptr2 - *ptr1));
     printf("%c", (char)(*ptr2 - *ptr1));
     return 0;
-}
+}
+
+// res: 
+//50
+//2

6.cpp

@@ -1,11 +1,12 @@
-#include<stdio.h>
+#include<stdio.h>
 int main()
 {
 	int a;
-	char *x;
-	x = (char *)&a;
+	char* x;
+	x = (char*)&a;
 	a = 512;
 	x[0] = 1;
 	printf("%d\n", a);
 	return 0;
 }
+//res : 513

7.cpp

@@ -2,9 +2,10 @@
 int main()
 {
 	int arr[] = { 1, 2, 3, 4, 5 };
-	int *p = arr;
-	++*p;
+	int* p = arr;
+	++* p;
 	p += 2;
 	printf("%d", *p);
 	return 0;
-}
+}
+//res :3

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" };
+	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));
-
-
-
 }
+
+//re: Be WooW