Question

Write a C program that loops and asks you every time to enter the name of a text file name, then it will read the file and perform statistics on its contents and display the results to the screen and to an output file called out.txt. The input files can be any text file.

The program should calculate these integers as it reads character by character as we did in the last class example filecopy and make use of the is_functions in ctype.h

int nletters = 0;
int nlower = 0;
int nupper = 0;
int ndigits = 0;
int npuncts = 0;
int nspaces = 0;
int nalnum = 0;//digit or letter
int nlines = 0; //count end of line chars '\n' or EOF

Answer 1

Code:

//including libraries required
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
int main()
{
   //file pointers
    FILE *fptr1, *fptr2;
   //string to store file name
   //and character to read each character from file
    char filename[20], c;
   //count to store number of each character
    int nletters = 0;
   int nlower = 0;
   int nupper = 0;
   int ndigits = 0;
   int npuncts = 0;
   int nspaces = 0;
   int nalnum = 0;
   int nlines = 0;

   //taking input from the user name of the file
    printf("Enter the filename to open for reading \n");
    scanf("%s", filename);

    // opening file
    fptr1 = fopen(filename, "r");
   //if file is empty
    if (fptr1 == NULL)
    {
        printf("Cannot open file %s \n", filename);
        exit(0);
    }

   //reading each character from file
    c = fgetc(fptr1);
    //this loop runs until file reaches the end
    while (c != EOF)
    {  
       //increasing count for every corresponding character

       if(isalpha(c)){
           nletters++;
       }
       if(isalnum(c)){
           nalnum++;
       }
       if(isdigit(c)){
           ndigits++;
       }
       if(islower(c)){
           nlower++;
       }
       if(isupper(c)){
           nupper++;
       }
       if(isspace(c)){
           nspaces++;
       }
       if(ispunct(c)){
           npuncts++;
       }
       if(c=='\n'){
           nlines++;
       }
      
        //reading next character  
        c = fgetc(fptr1);
    }
    //   increasing count for EOF
        nlines++;
        //closing the file
       fclose(fptr1);
   

    //opening new file for writing
   fptr2 = fopen("out.txt", "w");
   // printing to both file and screen
       fprintf(fptr2,"The number of Alphabets are : %d\n",nletters);
       fprintf(fptr2,"The number of Numbers are : %d\n",ndigits);
       fprintf(fptr2,"The number of spaces are : %d\n",nspaces);
       fprintf(fptr2,"The number of uppercase letters are : %d\n",nupper);
       fprintf(fptr2,"The number of lowercase letters are : %d\n",nlower);
       fprintf(fptr2,"The number of alnums are : %d\n",nalnum);
       fprintf(fptr2,"The number of newlines are : %d\n",nlines);
       fprintf(fptr2,"The number of Punctuations are : %d\n",npuncts);
      
       printf("The number of Alphabets are : %d\n",nletters);
       printf("The number of Numbers are : %d\n",ndigits);
       printf("The number of spaces are : %d\n",nspaces);
       printf("The number of uppercase letters are : %d\n",nupper);
       printf("The number of lowercase letters are : %d\n",nlower);
       printf("The number of alnums are : %d\n",nalnum);
       printf("The number of newlines are : %d\n",nlines);
       printf("The number of Punctuations are : %d\n",npuncts);
   fclose(fptr2);
   //closing file
  
    return 0;
}

Output:

File that we are going to read from:

Output:

File we wrote to:

Code Screenshot:

Code Snippet:

//including libraries required
#include <stdio.h> 
#include <stdlib.h>
#include <ctype.h>
int main() 
{ 
        //file pointers
    FILE *fptr1, *fptr2;
        //string to store file name
        //and character to read each character from file 
    char filename[20], c;
        //count to store number of each character 
    int nletters = 0;
        int nlower = 0;
        int nupper = 0;
        int ndigits = 0;
        int npuncts = 0;
        int nspaces = 0;
        int nalnum = 0;
        int nlines = 0; 
  
        //taking input from the user name of the file
    printf("Enter the filename to open for reading \n"); 
    scanf("%s", filename); 
  
    // opening file
    fptr1 = fopen(filename, "r");
        //if file is empty 
    if (fptr1 == NULL) 
    { 
        printf("Cannot open file %s \n", filename); 
        exit(0); 
    } 
  
        //reading each character from file 
    c = fgetc(fptr1); 
    //this loop runs until file reaches the end
    while (c != EOF) 
    {   
        //increasing count for every corresponding character

        if(isalpha(c)){
                nletters++;
                }
                if(isalnum(c)){
                nalnum++;
                }
                if(isdigit(c)){
                ndigits++;
                }
                if(islower(c)){
                nlower++;
                }
                if(isupper(c)){
                nupper++;
                }
                if(isspace(c)){
                nspaces++;
                }
                if(ispunct(c)){
                npuncts++;
                }
                if(c=='\n'){
                        nlines++;
                }
                 
        //reading next character    
        c = fgetc(fptr1); 
    } 
    //  increasing count for EOF
                nlines++;
                //closing the file
        fclose(fptr1);
        
   
    //opening new file for writing
        fptr2 = fopen("out.txt", "w");
        // printing to both file and screen
        fprintf(fptr2,"The number of Alphabets are : %d\n",nletters);
        fprintf(fptr2,"The number of Numbers are : %d\n",ndigits);
        fprintf(fptr2,"The number of spaces are : %d\n",nspaces);
        fprintf(fptr2,"The number of uppercase letters are : %d\n",nupper);
        fprintf(fptr2,"The number of lowercase letters are : %d\n",nlower);
        fprintf(fptr2,"The number of alnums are : %d\n",nalnum);
        fprintf(fptr2,"The number of newlines are : %d\n",nlines);
        fprintf(fptr2,"The number of Punctuations are : %d\n",npuncts);
        
        printf("The number of Alphabets are : %d\n",nletters);
        printf("The number of Numbers are : %d\n",ndigits);
        printf("The number of spaces are : %d\n",nspaces);
        printf("The number of uppercase letters are : %d\n",nupper);
        printf("The number of lowercase letters are : %d\n",nlower);
        printf("The number of alnums are : %d\n",nalnum);
        printf("The number of newlines are : %d\n",nlines);
        printf("The number of Punctuations are : %d\n",npuncts);
        fclose(fptr2);
        //closing file
         
    return 0; 
}