C Programming (Files)

C Programming

8 programs with Solution & Output

Rejaul Hoque Sarkar

Cont. No.- 9749189618 ; Email ID- srejaulhoque@gmail.com

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1/ Write a  C Program to create a text file.
Solution =>

#include<stdio.h>
#include<conio.h>
void main()
{
     char ch;
     FILE *fp;
     fp = fopen("SAMPLE.TXT", "w");
     clrscr();
     printf("\n Type the text press enter key at end. \n\n");
     while((ch = getchar())!= '\n')
          put(ch,fp);
     fclose(fp);
}

Output =>

--------------------------------------------------------------------------
Type the text press enter key at end.


computer programming in C language
is widely  used  for  Science  and
Engineering applications.
--------------------------------------------------------------------------

2/ Write a  C Program to read a text file and also count the number of vowels present in the file.
Solution =>

#include<stdio.h>
#include<conio.h>
#include<ctype.h>
void main()
{
     char ch;
     int count=0;
     FILE *fp;
     fp = fopen("SAMPLE.TXT", "r");
     clrscr();
     printf("\n The content of the text file is : ")
     while(!feof(fp))
     {
          ch = getch(fp);
          printf("%c",ch);
          switch(toupper (ch));
          {
               case 'A' :
               case 'E' :
               case 'I' :
               case 'O' :
               case 'U' : count++;
                          break;
          }
     }
     printf("\n\n Number of vowels present = %d", count);
     fclose(fp);
     getch();
}

Output =>

-----------------------------------------------------------------------------
The content of the text file is :

Computer  Programming in C  language is
widely used for Science and Engineering
applications.

Number of vowels present = 31
-----------------------------------------------------------------------------

3/ Write a  C Program to create a data file to store details of n students.
Solution =>

#include<stdio.h>
void main()
{
     int rno, tot, i, n;
     char sname[20];
     FILE *fp;
     fp = fopen("STUDENT.DAT", "w");
     clrscr();
     printf("\n How many students ? ");
     scanf("%d", &n);
     for(i = 0; i < n; i++)
     {
          printf("\n Student roll no., name, total ? ");
          scanf("%d %s %d", &rno, sname, &tot);
          fprintf(fp,"%d %s %d\n", rno, sname, tot);
     }
     fclose(fp);
}

Output =>

---------------------------------------------------------------------------------------
How many students ? 3
student roll no., name, total ? 101 ARUN 78
student roll no., name, total ? 102 DEEPAK 72
student roll no., name, total ? 222 WASIM 25
---------------------------------------------------------------------------------------

4/ Write a  C Program to process a data file/read information from a data file.
Solution =>

#include<stdio.h>
#include<conio.h>
void main()
{
     int rno, tot;
     char sname[20];
     FILE *fp;
     fptr = fopen("STUDENT.DAT", "r");
     clrscr();
     printf("\n-----------------------------------------------");
     printf("\n Roll No.              Name               Total");
     printf("\n-----------------------------------------------");
     while(!feof(fptr))
     {
          fscanf(fptr,"%d %s %d\n", &rno, sname, &tot);
          if(tot >= 75)
               printf("\n %6d \t %-20s %6d", rno, sname, tot);
     }
     printf("\n-----------------------------------------------");
     fclose(fptr);
     getch();
}

Output =>

_______________________________________________________________________

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