[Chap12][String] redesign string

Author: inpeterfomax

12_chap_mem/string/.string.cpp.swp

@@ -0,0 +1,93 @@
+#include "string2.h"
+#include <iostream>
+#include <cstring>
+
+using namespace std;
+
+String :: String ()
+{
+    cout << "default constructors!" << endl;
+}
+String :: String (const string s1)
+{
+    if (s1.length() > 0)
+    {
+        strcpy(raw,s1.c_str(),s1.length());
+    }
+}
+
+String String::operator= (const String s1) const
+{
+    if (strlen(s1.raw) > 0)
+    {
+        strcpy(raw,s1.raw,strlen(s1.raw));
+    }
+    
+    return *this;
+}
+
+String String::operator+ (const String s1) const
+{
+    String temp;
+
+    if (strlen(s1.raw) > 0)
+    {
+        strcpy(temp.raw,s1.raw,strlen(s1.raw));
+    }
+        strcpy(temp.raw + strlen(s1.raw),raw,strlen(raw));
+   
+       return temp; 
+}
+
+void String::stringup()
+{
+    char temp;
+    
+    if (strlen(raw) > 0)
+    {
+        for (int = 0 ; i < strlen(raw); i++)
+        {
+            if (raw[i] >= 'a' && raw[i] <= 'z')
+            {
+                raw[i] = raw[i] + '0'; //to high characters
+            }
+        }
+    }
+}
+
+void String::stringlow ()
+{
+    
+    if (strlen(raw) > 0)
+    {
+        for (int = 0 ; i < strlen(raw); i++)
+        {
+            if (raw[i] >= 'A' && raw[i] <= 'Z')
+            {
+                raw[i] = raw[i] - '0'; //to low characters
+            }
+        }
+    }
+}
+
+int String :: has (const char* c) const 
+{
+    int cout = 0;
+
+    if (c==NULL)
+    {
+        cout << "wrong format of c \n";
+        return 0;
+    } else 
+    {
+        for (int i = 0; i<strlen(raw),i++) 
+        {
+            if (raw[i] == c)
+            {
+                count++;
+            }
+        }
+    }
+
+    return count;
+}

12_chap_mem/string/.test.cpp.swp

@@ -0,0 +1,15 @@
+
+class String 
+{
+private:
+    enum {MAX=128;};
+    char raw[MAX];
+public:
+    String ();
+    String (const string s1);
+    String operator=(const String s1) const;
+    String operator+(const String s1) const;
+    void stringlow(); 
+    void stringup();
+    int has (const char* c) const;
+};

12_chap_mem/string/string.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+using namespace std;
+
+#include "string2.h"
+
+int main ()
+{
+    String s1 ("and I am a C++ student. ");
+    String s2 = "Please enter your name :";
+    String s3;
+    String ans;
+    bool success = false;
+
+    cout << s2;
+    cin >> s3;
+    s2 = "My name is  " + s3;
+    cout << s2 << ".\n";
+    s2 = s2 + s1;
+    s2.stringup();
+    cout << "The string \n" << s2 << "\n contains " << s2.has('A') 
+        << "'A' characters in it. \n";
+    s1 = "red" ;
+    String rgb[3] = { String(s1) ,String ("green"),String("blue")};
+    cout << "Enter the name of a primary color for mixing light: ";
+    while (cin >> ans)
+    {
+        ans.stringlow();
+        for (int i=0; i< 3; i++)
+        {
+            if (ans == rgb[i])
+            {
+                cout << "That's right !\n";
+                success = true;
+                break;
+            }
+        }
+        if (success)
+            break;
+        else 
+            cout << "Try again! \n";
+
+    }
+
+    cout << "Bye\n";
+    return 0;
+}