Creating a New Path through C code

/*
* CreatePath.c
*
* Created on: Feb 28, 2011
* Author: Karthikeyan.D
*/

#include <stdlib.h>
#include <stdio.h>

int main()
{
char path_buffer[_MAX_PATH];
char drive[_MAX_DRIVE];
char dir[_MAX_DIR];
char fname[_MAX_FNAME];
char ext[_MAX_EXT];

_makepath(path_buffer, "D", "\\Testdir\\myexample\\", "testfile", "txt");
printf("Path created with _makepath(): %s\n", path_buffer);
_splitpath(path_buffer, drive, dir, fname, ext);
printf("Path extracted with _splitpath():\n");
printf(" Drive: %s\n", drive);
printf(" Dir: %s\n", dir);
printf(" Filename: %s\n", fname);
printf(" Ext: %s\n", ext);
return 0;
}


OUTPUT:
Path created with _makepath(): D:\Testdir\myexample\testfile.txt
Path extracted with _splitpath():
Drive: D:
Dir: \Testdir\myexample\
Filename: testfile
Ext: .txt

Displaying the current working directories path through C coding

/*
* DisplayPath.c
*
* Created on: Feb 28, 2011
* Author: karthikeyan.D
*/

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <direct.h>

void DisplayFullPath(char *relPath)
{
/*Buffer*/
char full[_MAX_PATH];

if(_fullpath(full, relPath, _MAX_PATH) != NULL)
printf("The full path is: %s\n", full);
else
printf("Invalid path\n");
}

int main()
{
// For displaying the actual path
DisplayFullPath("test.txt");

// For displaying the current working directory and file name
DisplayFullPath("\\test.txt");

// Displaying up to two sub_directories
DisplayFullPath("..\\test.txt");

// Display full path
DisplayFullPath(".");

return 0;
}

OUTPUT:

The full path is: E:\WORK\March2011\DispalyFullPath\test.txt
The full path is: E:\test.txt
The full path is: E:\WORK\March2011\test.txt
The full path is: E:\WORK\March2011\DispalyFullPath

Random order for array elements

/*
* RandomOrder.c
*
* Created on: Feb 28, 2011
* Author: Karthikeyan.D
*/
# include <stdio.h>
# include <windows.h>

int main()
{


//Variable Declaration
int szArray[20];
int i,SwapIndex,temp;

// Value Assignment
for(i=0;i<20;i++)
szArray[i]=i+1;

//Array Value Shuffling
for(i=0; i<20;i++)
{
do
{
SwapIndex = rand()+1;
}while(SwapIndex >= 20);
temp = szArray[i];
szArray[i] = szArray[SwapIndex];
szArray[SwapIndex] = temp;
}
// Dispaly part
for(i=0;i<20;i++)
printf("%d\n",szArray[i]);


return 0;
}

OUTPUT:

10
1
7
11
6
17
5
16
8
20
18
12
13
9
3
2
19
4
15
14

C-Variables Detail

 

Verbose Option

 include <stdio.h>
# include <stdlib.h>
int main()
{
    //Using this line we can assign 0 for all the array element.
    int a[10]={};
    //This line declare the array with some garbage value.
    int b[10];
    //This line used to set the first element value as one and remaining all are zero's.
    int c[10]={1};
    int i=0;
    //This for loop used for printing the array element and their index value's.
    for(;i<10;i++)
    {
    printf("Index%d-content=%d\tIndex%d-content=%d\tIndex%d-content=%d\n",i,a[i],i,c[i],i,b[i]);
    }

    return 0;
}




Output:

Index0-content=0    Index0-content=1    Index0-content=-2
Index1-content=0    Index1-content=0    Index1-content=1982242980
Index2-content=0    Index2-content=0    Index2-content=1982310602
Index3-content=0    Index3-content=0    Index3-content=3411632
Index4-content=0    Index4-content=0    Index4-content=3411568
Index5-content=0    Index5-content=0    Index5-content=2293552
Index6-content=0    Index6-content=0    Index6-content=1982310408
Index7-content=0    Index7-content=0    Index7-content=0
Index8-content=0    Index8-content=0    Index8-content=0
Index9-content=0    Index9-content=0    Index9-content=2147315712

Deleting the number of lines without using other files

/*
 * DeleteTrace.c
 *
 *  Created on: Feb 1, 2011
 *      Author: Karthikeyan.D
 */
# include <stdio.h>
# include <conio.h>
# include <windows.h>
# include <stdlib.h>

int main()
{
    // Variable Declaration
    FILE *FRead,*FWrite;
    char SzContent[1000];
    long int nloop;
    long int nLineIndex;
    /* File read and Read/write Mode Operation*/
    // Here You Can Your File Location.

    printf("Enter file File Path \n");
    gets(SzContent);

    FRead = fopen(SzContent,"r");

    FWrite = fopen(SzContent,"r+");
    if(FRead == NULL)
    {
        MessageBox(NULL,"Please Specify Already Created File Location ","Error in File Location",16);
        exit(0);
    }

    printf("Enter the Line Index \n");
    scanf("%ld",&nLineIndex);

    /* This function is used to remove the number lines*/
    for (nloop=0;nloop<nLineIndex;nloop++)
    {
        fgets(SzContent,1000,FRead);
    }
    /* This function is used to overwrite content from the top of the line*/
    while(fgets(SzContent,1000,FRead)!=NULL)
    {
        fprintf(FWrite,SzContent);
    }
    /* To close the Two File Pointer */
    fclose(FRead);
    fclose(FWrite);

    getch();
    return 0;
}

C++ Constructor Concept

/*
 * Devices.cpp
 *
 *  Created on: Jan 27, 2011
 *      Author: Karthikeyan.D
 */

#include "Devices.h"

Devices::Devices() {
    // TODO Auto-generated constructor stub
cout<<"Hello World1"<<endl;

}

Devices::~Devices() {

    // TODO Auto-generated destructor stub
    cout<<"Hello World2"<<endl;
}


int main()
{
    Devices Obj;
    Obj.chair();


return 0;
}
---------------------------------------------------------------------------------------------------------
/*
 * Devices.h
 *
 *  Created on: Jan 27, 2011
 *      Author: Karthikeyan.D
 */

#ifndef DEVICES_H_
#define DEVICES_H_
# include
class Devices {
public:
    //int Chair();
    int chair()
    {
        cout << "This method is used to understand the Object creation in the C++ "<<endl;
        return 0;
    }
    Devices();
    virtual ~Devices();

};

#endif /* DEVICES_H_ */


________________________________________________________________________________

OUTPUT:









Hello World1
This method is used to understand the Object creation in the C++
Hello World2

How to display the message box through Command Prompt

How to display the message box through Command Prompt

Procedure:

Step 1: Go to “Start” Menu and Click Run option.

Step 2: Enter “cmd” in drop down box.

Step 3: In CMD window, Type as “msg Console [User Content]”.

Ex: msg console Enjoy life with new technology!!!

OUTPUT:

 

How to find the variable size without using Sizeof function

/*
 * sizeofVariable.c
 * Author : karthikeyan.D
 * Date: 1-Nov-2010
 *
 */
/* please refer this following statements.
#ifndef __SIZE_T
#define __SIZE_T
typedef unsigned int size_t;
#endif
.... meaning that on this particular implementation `size_t' is
an `unsigned int'.

*/


# include <stdio.h>
# include <stdlib.h>
//user definition
# define size_var( var ) ((size_t)(&(var)+1)-(size_t)(&(var)))

int main()
{
    int nVal;
    char cChar;
    printf("size of :%d\n",size_var(nVal));
    printf("size of :%d",size_var(cChar));
    return 0;
}