PROGRAM 110

Object

Write a program that counts the total number of characters, tabs, spaces and new lines in a file.
(download example8.txt)

Algorithm

1. Create an ifstream object inFile to handle input operations on a file.
2. Declare character variables ch and fn[30].
3. Declare integer variables noc, nob, nol and not.
4. Set noc=0, nob=0, nol=0 and not=0.
5. Read filename fn (example8.txt in this case).
6. Open the file named example8.txt using inFile.open().
7. IF the file fails to open,
   • Write “Error: Unable to open the file”.
   • Exit.
   • [End of IF structure.]
8. WHILE ch ≠ End of file (i.e., until the end of the file is reached)
   • ch = inFile.get().
     • noc++.
   • IF ch = ‘ ‘
     • nob++.
   • [End of IF structure.]
   • IF ch = ‘\n’
     • nol++.
   • [End of IF structure.]
   • IF ch = ‘\t’
     • not++.
   • [End of IF structure.]
   • [End of WHILE loop.]
9. Close the file.
10. Write “The number of characters = noc, blanks = nob, tabs = not and lines = nol”
11. Exit.

Flowchart

C++ Source Code

// program 110
#include<iostream>
#include <fstream>
using namespace std;

int main()
{
  ifstream inFile;
  char ch, fn[30];
  int noc = 0, nob = 0, nol = 0, notb = 0;

  cout << "Enter file name: ";
  cin >> fn;

  inFile.open(fn);
  if (!inFile.is_open())
  {
    cout << "Error: Unable to open the file" << endl;
    return 1;
  }

  while ((ch = inFile.get()) != EOF)
  {
    noc++;
    if (ch == ' ')
      nob++;
    if (ch == '\n')
      nol++;
    if (ch == '\t')
      notb++;
  }

  inFile.close();

  cout << "\nThe file \"" << fn << "\" contains the following:" << endl;
  cout << "Number of characters = " << noc << endl;
  cout << "Number of blanks = " << nob << endl;
  cout << "Number of tabs = " << notb << endl;
  cout << "Number of lines = " << nol << endl;

  return 0;
}

C Source Code

/*program 110*/
#include<stdio.h>
#include<stdlib.h>

int main()
{
  FILE *fptr;
  char ch, fn[30];
  int noc=0, nob=0, nol=0, not=0;
  printf("Enter file name: ");
  scanf("%s", &fn);
  fptr = fopen(fn, "r");
  if(fptr==NULL)
     {
     printf("Error: Unable to open the file");
     exit(1);
     }
  while(ch != EOF)
     {
     ch=fgetc(fptr);
       noc++;
     if(ch==' ')
       nob++;
     if(ch=='\n')
       nol++;
     if(ch=='\t')
       not++;
     }
  fclose(fptr);
  printf("\nThe file \"%s\" contains the following: ", fn);
  printf("\nNumber of characters = %d", noc);
  printf("\nNumber of blanks = %d", nob);
  printf("\nNumber of tabs = %d", not);
  printf("\nNumber of lines = %d", nol);
  
  return 0;
}

Output

Enter file name: example8.txt

The file “example8.txt” contains the following:
Number of characters = 693
Number of blanks = 111
Number of tabs = 2
Number of lines = 4