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c++/Others/Misc. Programs In C++.cpp

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+Misc. Programs In C++
+
+//This is a program for copy desired file.
+//You can use this program as garbage with ur program.
+
+#include <iostream.h>
+#include <fstream.h>
+#include <process.h>
+#include <conio.h>
+void main()
+{
+   ifstream infile;
+   ofstream outfile;
+   ofstream printer;
+   char filename[20];
+   cout<<"
+Enter the desired file to copy.";
+   cin>>filename;
+   infile.open(filename,ios::nocreate);
+   if(!infile)
+   {
+      cout<<"Input file can not be opened."<<endl;
+      exit(1);
+   }
+   outfile.open("copy");
+   if(!outfile)
+   {
+      cout<<"Output file can not be opened.";
+      exit(1);
+   }
+   printer.open("PRN");
+   if(!printer)
+      {
+         cout<<"There is a problem with printer.";
+         getch();
+         exit(1);
+      }
+   cout<<"All files have been opened.";
+   char ch;
+   outfile<<"This is the begining of the file.";
+   while(infile.get(ch))
+   {
+      outfile.put(ch);
+   }
+   infile.close();
+   outfile.close();
+   getch();
+}
+
+// This is How a Header file is creatred and used.
+
+#include <iostream.h>
+#include <string.h>
+class college
+{
+   private:
+          char collegename[80];
+   public:
+      college()
+      {
+         strcpy(collegename,"XXX");
+      }
+      char * getcollegename()
+      {
+         return collegename;
+      }
+};
+class student:public college
+{
+   private:
+      char studname[40];
+      char address[80];
+   public:
+      student(char *name)
+      {
+         strcpy(studname,name);
+      }
+      char * studentname()
+      {
+         return studname;
+      }
+      setaddress(char *add)
+      {
+         strcpy(address,add);
+      }
+      char * studentaddress()
+      {
+         return address;
+      }
+};
+
+
+#include <d:cppcollege.h>
+#include <conio.h>
+void main()
+{
+   clrscr();
+   studentfile student;
+   student.studentname("XXX");
+   getch();
+};
+
+
+#include <iostream.h>
+#include <conio.h>
+#include <stdarg.h>
+//Declare a function with one required parameter
+void display(int number,...);
+void main()
+{
+   int index=5;
+   int one=1,two=2;
+   clrscr();
+   display(one,index);
+   getch();
+}
+void display(int number,...)
+{
+   va_list para;
+   va_start(para,number);
+   cout<<"The parameters are:"<<endl;
+   cout<<va_arg(para,int)<<" ";//extract a parameter
+}
+
+
+#include<stdio.h>
+#include<conio.h>
+void main()
+  {
+    clrscr();
+    printf("%d
+%d",sizeof(NULL),sizeof(""));
+    getch();
+  }
+
+#include<stdio.h>
+#include<conio.h>
+void main()
+ {
+  int a=10,b=20;
+  clrscr();
+  swapv(&a,&b);
+  printf("
+ A=%d",a);
+  printf("
+ B=%d",b);
+  getch();
+ }
+
+ swapv(int *x,int *y)
+  {
+   int t;
+   t=*x;
+   *x=*y;
+   *y=t;
+   return;
+  }
+
+
+/* This is the program using pointer to swap values */
+
+#include<stdio.h>
+#include<conio.h>
+void main()
+ {
+  int a=10,b=20;
+  clrscr();
+  nilesh(a,b);
+  printf("
+ A=%d",a);
+  printf("
+ B=%d",b);
+  getch();
+ }
+
+  nilesh(x,y)
+  {
+   int t;
+   t=x;
+   x=y;
+   y=t;
+   printf("
+ X=%d",x);
+   printf("
+ Y=%d",y);
+   return;
+  }