Initial commit

c++/Others/A copy constructor to allow StringClass objects to be passed to functions..cpp

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+A copy constructor to allow StringClass objects to be passed to functions.
+#include <iostream>
+#include <cstring>
+#include <cstdlib>
+using namespace std;
+
+class StringClass {
+  char *p;
+public:
+  StringClass(char *s);           // constructor
+  StringClass(const StringClass &o);  // copy constructor
+  ~StringClass() {                // destructor
+     delete [] p; 
+  } 
+  char *get() { 
+     return p; 
+  }
+};
+
+
+StringClass::StringClass(char *s)     // "Normal" constructor
+{
+  int l;
+
+  l = strlen(s)+1;
+
+  p = new char [l];
+  if(!p) {
+    cout << "Allocation error\n";
+    exit(1);
+  }
+
+  strcpy(p, s);
+}
+
+
+StringClass::StringClass(const StringClass &o)   // Copy constructor
+{
+  int l;
+
+  l = strlen(o.p)+1;
+
+  p = new char [l];                  // allocate memory for new copy
+  if(!p) {
+    cout << "Allocation error\n";
+    exit(1);
+  }
+
+  strcpy(p, o.p);                    // copy string into copy
+}
+
+void show(StringClass x)
+{
+  char *s;
+   
+  s = x.get();
+  cout << s << endl;
+}
+
+int main()
+{
+  StringClass a("Hello World"), b("Hello World");
+
+  show(a);
+  show(b);
+
+  return 0;
+}