Commit: 52 - CTraining (svn)

練習用です。いろんなものがごちゃまぜです。

Commit MetaInfo

• Revision: 52 (tree)
• Time: 2015-10-12 11:23:54
• Author: bellyoshi

Log Message

(empty log message)

Change Summary

• modified: TeachYourSelf/strtype.obj
• added: TeachYourSelf/dynaarray.obj
• added: TeachYourSelf/arraytype.cpp
• modified: TeachYourSelf/strtype.BAK
• added: TeachYourSelf/dynaarray.BAK
• modified: TeachYourSelf/strtype.exe
• added: TeachYourSelf/dynaarray.exe
• modified: TeachYourSelf/coord.obj
• modified: TeachYourSelf/strtype.cpp
• modified: TeachYourSelf/coord.BAK
• added: TeachYourSelf/dynaarray.cpp
• modified: TeachYourSelf/coord.exe
• modified: TeachYourSelf/coord.cpp
• added: TeachYourSelf/arraytype.obj
• added: TeachYourSelf/arraytype.BAK
• added: TeachYourSelf/arraytype.exe

Incremental Difference

--- TeachYourSelf/arraytype.cpp	(nonexistent)
+++ TeachYourSelf/arraytype.cpp	(revision 52)
@@ -0,0 +1,35 @@
+#include <iostream>
+using namespace std;
+
+const int SIZE = 5;
+
+class arraytype{
+	int a[SIZE];
+public:
+	arraytype(){
+		for(int i = 0;i < SIZE; i++)a[i] = i;
+	}
+	int &operator[](int i);
+};
+
+int &arraytype::operator[](int i)
+{
+	if (i < 0 || i > SIZE -1){
+		cout << "\n";
+		cout << i << "は境界エラー\n";
+		exit(1);
+	}
+	return a[i];
+}
+int main()
+{
+	arraytype ob;
+	ob[2] = 13;
+	for(int i = 0; i < SIZE; i++){
+		cout << ob[i] << "  ";
+	}
+	ob[100] = 2;
+	cout << "\n";
+	
+	return 0;
+}
\ No newline at end of file

--- TeachYourSelf/strtype.cpp	(revision 51)
+++ TeachYourSelf/strtype.cpp	(revision 52)
@@ -9,9 +9,12 @@
 public:
 	strtype(char *ptr);
 	strtype(const strtype &s);
+	strtype &operator=(strtype &ob);
+	char &operator[](int i){return p[i];}
 	~strtype();
 	char *get(){return p;}
 	int getlen(){return len;}
+	
 };
 
 strtype::strtype(char *ptr)
@@ -29,6 +32,7 @@
 
 strtype::strtype(const strtype &s)
 {
+	cout << "コピーコンストラクタ\n";
 	len = s.len;
 	p = new char[len];
 	if (!p){
@@ -37,7 +41,21 @@
 	}
 	strncpy(p, s.p,len);
 }
-
+strtype &strtype::operator=(strtype &ob)
+{
+	cout << "=オペレータ\n";
+	if(len < ob.len){
+		delete [] p;
+		p = new char [ob.len];
+		if (!p){
+			cout << "メモリ割り当てエラー";
+			exit(1);
+		}
+	}
+	len = ob.len;
+	strcpy(p, ob.p);
+	return *this;
+}
 strtype::~strtype()
 {
 	cout << "pを解放する。\n";
@@ -52,8 +70,15 @@
 int main()
 {
 	strtype s1("This is a test."), s2("I like C++.");
+	strtype s3 = s1;
+	s3 = s1;
 	show(s1);
 	show(s2);
+	show(s3);
+	for(int i = 0; i < s1.getlen(); i++){
+		cout << s1[i] << " ";
+	}
+	cout << "\n";
 	
 	return 0;
 }
\ No newline at end of file

--- TeachYourSelf/dynaarray.cpp	(nonexistent)
+++ TeachYourSelf/dynaarray.cpp	(revision 52)
@@ -0,0 +1,51 @@
+#include <iostream>
+using namespace std;
+
+class dynarray {
+	int *p;
+	int size;
+public:
+	dynarray(int a);
+	int &operator[](int i){return p[i];}
+	dynarray &operator=(dynarray &ob);
+};
+
+dynarray::dynarray(int a)
+{
+	p = new int[a];
+	if (!p){
+		cout << "メモリ割り当てエラー\n";
+		exit(1);
+	}
+	size = a;
+}
+dynarray &dynarray::operator=(dynarray &ob)
+{
+	if(size < ob.size){
+		delete [] p;
+		p = new int[ob.size];
+		if (!p){
+			cout << "メモリ割り当てエラー\n";
+			exit(1);
+		}
+	}
+	size = ob.size;
+	for(int i = 0; i < size; i++){
+		p[i] = ob.p[i];
+	}
+	return *this;
+}
+
+int main(){
+	dynarray d1(10);
+	for(int i = 0; i < 10; i++){
+		d1[i] = i * i;
+	}
+	d1[5] = 30;
+	dynarray d2(0);
+	d2 = d1;
+	for(int i = 0; i < 10; i++){
+		cout << d2[i] << "\n";
+	}
+	return 0;
+}
\ No newline at end of file

--- TeachYourSelf/coord.cpp	(revision 51)
+++ TeachYourSelf/coord.cpp	(revision 52)
@@ -18,7 +18,23 @@
 	coord operator--();
 	coord operator--(int notused);
 	coord operator-();
+	friend coord operator+(coord ob1, int i);
+	friend coord operator+(int i, coord ob1);
 };
+coord operator+(int i, coord ob1)
+{
+	coord temp;
+	temp.x = ob1.x + i;
+	temp.y = ob1.y + i;
+	return temp;
+}
+coord operator+(coord ob1, int i)
+{
+	coord temp;
+	temp.x = ob1.x + i;
+	temp.y = ob1.y + i;
+	return temp;
+}
 int coord::operator==(coord ob2)
 {
 	return x == ob2.x && y == ob2.y;
@@ -108,5 +124,7 @@
 	print(o3);
 	o3--;
 	print(o3);
+	o3 = o3 + 2;
+	print(o3);
 	return 0;
 }
\ No newline at end of file