File Management in C

Simple File Management

Using Command Line Argument

#include "stdio.h" #include "conio.h" #include "stdlib.h" void main() { FILE *fp1,*fp2; char ch; clrscr(); //Open File 1 in Read Mode fp1=fopen(“D:\abc.txt”,"r");    //Open File 2 in Write Mode fp2=fopen(“D:\xyz.txt”,"w");    //Read data from File 1 ch=getc(fp1);    while(ch!=EOF)       {        printf("%c",ch);       //Write data to File 2        putc(ch,fp2);      //Read data From File 1        ch=getc(fp1);       } fclose(fp); fclose(fp1); getch(); }

#include "stdio.h" #include "conio.h" #include "stdlib.h" void main(int argc,char *argv[]) { FILE *fp1,*fp2; char ch; clrscr(); //Open File 1 in Read Mode fp1=fopen(argv[1],"r");    //Open File 2 in Write Mode fp2=fopen(argv[2],"w");    //Read data from File 1 ch=getc(fp1);    while(ch!=EOF)       {        printf("%c",ch);        //Write data to File 2        putc(ch,fp2);       //Read data From File 1        ch=getc(fp1);       } fclose(fp); fclose(fp1); getch(); }

Example of Function in C

#include  "stdio.h"

#include  "conio.h"

//For Example as Simple Function

int Addition (int a,int b)

  {

   return a+b;

  }

//For Example of Recursion Function

//Use of Conditional Operator

int factorial(int a)

{

    return (a>0)?(a*factorial(a-1)):1;

}

//For Example of Pass By Reference

void swap(int *p,int *q)

{

int *r;

*r=*p;

*p=*q;

*q=*r;

}

void main()

{

int i=4,j=3;

clrscr();

printf("\nAddition = %d",Addition(i,j)); // Pass by value

printf("\nFactorial= %d",factorial(i));    // Recursion function

swap(&i,&j);                                             // Pass by reference

printf("\n After Swaping");

printf("\n I=%d  J=%d",i,j);

getch();

}

Example of Array in C

#include  "stdio.h"

#include  "conio.h"

//Function Used to Sort an Array

void sort(int a[5])

   {

     int i=0,j=0,temp;

     for(i=0;i<5;i++)

             {

              for(j=i+1;j<5;j++)

                 {

                  if(a[i]>a[j])

                         {

                          temp=a[i];

                          a[i]=a[j];

                          a[j]=temp;

                         }

                 }

             }

   }

void main()

{

int a[5]={4,2,5,3,1};

int m1[2][2]={1,2,3,4},m2[2][2]={2,2,2,2},m3[2][2]={0};

int add=0,i,j;

clrscr();

//One Dimension Addition

for(i=0;i<5;i++)

   {

    add+=a[i];

   }

printf("\nAddition = %d",add);

//Before Sorting Data

printf("\n Before Sorting Data");

for(i=0;i<5;i++)

   {

    printf("\n %d - %d",i+1,a[i]);

   }

sort(a);    // Sort Function is Called

//After Sorting Data

printf("\n After Sorting Data");

for(i=0;i<5;i++)

   {

    printf("\n %d - %d",i+1,a[i]);

   }

//Addition of Two Dimensional Array (Metrix)

for(i=0;i<2;i++)

   {

    for(j=0;j<2;j++)

       {

            m3[i][j]=m1[i][j]+m2[i][j];

       }

   }

//Code for Print Two Dimensional Array

for(i=0;i<2;i++)

   {

    printf("\n");

    for(j=0;j<2;j++)

       {

            printf("\t%d",m3[i][j]);

       }

   }

getch();

}