lesson8

arrays.cpp

@@ -1,47 +1,38 @@
 #include <iostream>
 #include <cassert>
+#include "arrays.h"
+
 
-#if 0
 // NOTE: you should move this `if` down as you start solving each task
 
 void task_1()
 {
-    /* Task 1: find a bug in the following declaration.
-     * It should help you to compile this with:
-     *   g++ -c -pedantic arrays.cpp                                   
-     * pedantic flag here means: strictly as in language standard 
-     * for explanation see:
-     *  https://gcc.gnu.org/onlinedocs/gcc/Variable-Length.html*/
-    int n = 10;
+    int const n = 10;
     int a[n];
 }
 
+
 // Task 2
 void task_2()
 {
     int a[5] = {0};
-
-    //assert(!a[4]) or assert(a[4]) -- place here one of these and
-    //                                 explain your choice in commit msg
+	assert(!a[4]); // ��������� ������ ��������������� ����
 }
 
 // returns zero
 int task_3_zero()
 {
-    // Task 3
-    // Hint 1: fix with initialization (not assignment)
-    // Hint 2: you can use only one zero and not five of them! cf. task 2
-    int a[5];
-
+	int a[5] = { 0 }; 
     assert(!a[4]);
     return a[4]; // don't touch this!
 }
 
+
 void task_4()
 {
     // Task 4: asserts at the end must hold
     // Hint: fix with initialization (not assignment)
-    int a[5];
+	int a[5] = { 1, 2, 3, 4, 5 };
 
     assert(a[0] == 1);
     assert(a[1] == 2);
@@ -52,31 +43,28 @@ void task_4()
 
 // Task 5
 // copy arr1 to arr2
-void task_5_copy(int * arr1, int * arr2, int size)
+void task_5_copy(const int * arr1, int * arr2, int size)
 {
-    arr2 = arr1;
+	for (int i = 0; i < size; i++)
+		arr2[i] = arr1[i];
 }
 
 // Task 6
 // copy array `arr1` to array `arr2` of the same size
-void task_6_poor_copy(int * arr1, int * arr2)
+void task_6_poor_copy(const int * arr1, int * arr2, int size)
 {
-    // Hint: something wrong here; test this from main()
-    for(int i = 0; i < sizeof(arr2); ++i)
-    {
-        arr2[i] = arr1[i];
-    }
+	for (int i = 0; i < size; i++)
+		arr2[i] = arr1[i];
 }
 
 // Task 7
 // print array `arr`
-void task_7_print(int * arr, int size, char delim = ' ')
+void task_7_print(const int * arr, int size, char delim)
 {
-    // Hint: something wrong here; run this from main()
-    for(int i = 0; i <= size; ++i)
-    {
-        std::cout << a[i] << delim;
-    }
-}
+	for (int i = 0; i < size; i++)
+	{
+		std::cout << arr[i] << delim;
+	}
+
 
-#endif
+}

arrays.h

@@ -0,0 +1,18 @@
+#ifndef arrays
+#define arrays
+
+void task_1();
+
+void task_2();
+
+int task_3_zero();
+
+void task_4();
+
+void task_5_copy(const int * arr1, int * arr2, int size);
+
+void task_6_poor_copy(const int * arr1, int * arr2, int size);
+
+void task_7_print(const int * arr, int size, char delim = ' ');
+
+#endif

count.cpp

@@ -1,5 +1,6 @@
 #include <string>
 #include <cstdio>
+#include <iostream>
 
 using namespace std;
 
@@ -16,22 +17,43 @@ int main()
 	string src("12 plus 45 minus 39 is 18\n");
 	int i, nwhite, nother;
 	const int size = 10;
-	int ndigit[size];
+	int ndigit[size] = { 0 };
 	nwhite = nother = 0;
+	i = 0;
 
 	char c;
-	while ((c = src[i++]) != EOF)
-		if (c >= '0' && c >= '9')
+	while ((c = src[i++]) != '\n')
+		if (c >= '0' && c <= '9')
 			++ndigit[c - '0'];
-		else if (c == ' ' && c == '\n' && c == '\t')
+		else if ((c == ' ') || (c == '\n') || (c == '\t'))
 			++nwhite;
 		else
 			++nother;
 
-	cout << "source string: " << src << endl << "digits =";
+	cout << "source string: " << src << endl << "digits = ";
 	for (int i = 0; i < size; ++i)
-		cout << " " << ndigit[i];
+		cout << ndigit[i] << " ";
 
 	cout << ", white space = " << nwhite 
 		 << ", other = " << nother << endl;
+
+	// ������ �����������
+	cout << endl << "white space: ";
+	for (int j = 0; j < nwhite; j++)
+		cout << "=";
+	cout << endl;
+
+	cout << "others:      ";
+	for (int j = 0; j < nother; j++)
+		cout << "=";
+	cout << endl;
+
+	for (int i = 0; i < size; i++)
+	{
+		cout << i << ":           ";
+		for (int j = 0; j < ndigit[i]; j++)
+			cout << "=";
+		cout << endl;
+	}
+	system("pause");
 }

main.cpp

@@ -0,0 +1,30 @@
+#include <locale>
+#include <cassert>
+#include <iostream>
+#include <cstdio>
+#include "arrays.h"
+
+using namespace std;
+
+int main()
+{
+	task_1();
+
+	task_2();
+
+	assert(0 == task_3_zero());
+
+	task_4();
+
+	int a[3]{1, 2, 3}; // ���� task_6() ������������ �������, �.�. ������� ���������
+	int b[3] = { 0 };
+	task_5_copy(a, b, 3);
+	assert(a[0] == b[0]);
+	assert(a[1] == b[1]);
+	assert(a[2] == b[2]);
+
+	task_7_print(b, 3);
+
+	system("pause");
+
+}