character_analysis_in_file_v1.c

/*

    character_analysis_in_file_v1.c         by Dragan Milicev

Character analysis in a file.


Ascii table:

characters_0    0 -  31   special characters

characters_1   32 -  47

0 - 9    48 -  57   digits

characters_2   58 -  64

A - Z    65 -  90   capital letters

characters_3   91 -  96

a - z    97 - 122   small letters

characters_4  123 - 126


Character occurrences statistics in a file.
Total number of lines.
Total number of words.
The number of occurrences of each character.


You can find all my C programs at Dragan Milicev's pastebin:

https://pastebin.com/u/dmilicev

*/

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

#define BUFFER_SIZE 100
#define NUM_OF_ASCII_CHARACTERS 256


int main(int argc, char *argv[]) {

    FILE* pointer_to_the_input_file;
    FILE* pointer_to_the_output_file;
    char input_file_name[BUFFER_SIZE];
    char output_file_name[BUFFER_SIZE];
    char ch;
    int num_of_characters = 0;      // total number of characters in the input file
    int num_of_lines = 0;           // total number of lines (rows) in the input file
    int num_of_small_letters = 0;   // total number of small letters in the input file
    int num_of_capital_letters = 0; // total number of capital letters in the input file
    int num_of_digits = 0;          // total number of digits in the input file
    int num_of_spaces = 0;          // total number of spaces (blanko) in the input file
    int num_of_tabs = 0;            // total number of tabs in the input file
    int num_of_spaces_and_tabs = 0; // total number of spaces and tabs in the input file
    int arr_for_ch_occurrences[NUM_OF_ASCII_CHARACTERS]; // array for each character's occurrence numbers
    int i;

    for(i=0;i<argc;i++)
        printf("\n %3d. argument of program is \n %s \n", i, argv[i] );

    // get input file name
    if( argc == 1 ) {   // if no arguments are given to the program
        printf("\n No arguments were provided when calling the program.\n");
        printf("\n You can specify the name of the input file as the program argument.");
        //exit(EXIT_FAILURE);

        // Enter the name of the input file in the program
        printf("\n\n Enter name of the input file: ");
        //scanf("%[^\n]",input_file_name);  // or, better, to awoid buffer overflow:
        fgets(input_file_name,BUFFER_SIZE,stdin);
        // We have to finish the string. Replace the newline with null char.
        input_file_name[strlen(input_file_name)-1] = '\0';
        //printf("\n|%s|\n",input_file_name);
    }
    else {              // arguments are given to the program
        strcpy(input_file_name,argv[1]);
    }

    //strcpy(input_file_name,"character_analysis_in_file_v1.c");

    // make output file name
    strcpy(output_file_name,"statistic_for_");
    strcat(output_file_name,input_file_name);
    strcat(output_file_name,".txt");

    printf("\n Input file name:  %s \n",input_file_name);
    printf("\n Output file name: %s \n",output_file_name);

    // open the input file
    if( (pointer_to_the_input_file = fopen(input_file_name, "r")) == NULL ) {
        fprintf(stderr, "\n\n Error opening input file %s ! \n\n", input_file_name );
        exit(EXIT_FAILURE);
    }

    // open the output file
    if( (pointer_to_the_output_file = fopen(output_file_name, "w")) == NULL ) {
        fprintf(stderr, "\n\n Error opening output file %s ! \n\n", output_file_name );
        exit(EXIT_FAILURE);
    }

    // Zeroing counter array
    for(i=0;i<NUM_OF_ASCII_CHARACTERS;i++)
        arr_for_ch_occurrences[i] = 0;      // array for each character's occurrence numbers

    // analysis of the input file,
    // loading one character at a time from the input file to the end (EOF) of the input file
    while( (ch = fgetc(pointer_to_the_input_file)) != EOF ) {

        num_of_characters++;            // Total number of characters

        arr_for_ch_occurrences[ch]++;   // array for each character's occurrence numbers

    } // while( (ch = fgetc(pointer_to_the_input_file)) != EOF )


    // the number of lines (rows) is the same as the number of /n characters whose dec code is 10
    num_of_lines = arr_for_ch_occurrences[10];

    for(i='0';i<='9';i++)               // total number of digits in the input file
        num_of_digits = num_of_digits + arr_for_ch_occurrences[i];

    for(i='a';i<='z';i++)               // total number of small letters in the input file
        num_of_small_letters = num_of_small_letters + arr_for_ch_occurrences[i];


    for(i='A';i<='Z';i++)               // total number of capital letters in the input file
        num_of_capital_letters = num_of_capital_letters + arr_for_ch_occurrences[i];

    // the spaces (blanks) characters number is the same as the number of character whose dec code is 32
    num_of_spaces = arr_for_ch_occurrences[32];

    // the number of tabs is the same as the number of character whose dec code is 9
    num_of_tabs = arr_for_ch_occurrences[9];

    // the number of tabs and spaces (blanks)
    num_of_spaces_and_tabs = num_of_spaces + num_of_tabs;


    // display the analysis results on screen and in output file
    // (only shows characters that appear in the file)

    printf("\n\n In input file \"%s\" there are: \n\n", input_file_name );
    fprintf(pointer_to_the_output_file,"\n\n In input file \"%s\" there are: \n\n", input_file_name );

    printf(" %7d characters \n\n", num_of_characters ); //  total number of characters in the input file
    fprintf(pointer_to_the_output_file," %7d characters \n\n", num_of_characters );

    printf(" %7d lines (rows) \n\n", num_of_lines );     //  total number of lines (rows) in the input file
    fprintf(pointer_to_the_output_file," %7d redova \n\n", num_of_lines );

    printf(" %7d small letters \n\n", num_of_small_letters );
    fprintf(pointer_to_the_output_file," %7d small letters \n\n", num_of_small_letters );

    printf(" %7d capital letters \n\n", num_of_capital_letters );
    fprintf(pointer_to_the_output_file," %7d capital letters \n\n", num_of_capital_letters );

    printf(" %7d digits \n\n", num_of_digits );
    fprintf(pointer_to_the_output_file," %7d digits \n\n", num_of_digits );

    printf(" %7d spaces \n\n", num_of_spaces );
    fprintf(pointer_to_the_output_file," %7d spaces \n\n", num_of_spaces );

    printf(" %7d tabs \n\n", num_of_tabs );
    fprintf(pointer_to_the_output_file," %7d tabs \n\n", num_of_tabs );

    printf(" %7d spaces and tabs \n\n", num_of_spaces_and_tabs );
    fprintf(pointer_to_the_output_file," %7d spaces and tabs \n\n", num_of_spaces_and_tabs );

    printf("\n\n hex dec   ch   br_ch \n\n\n");    // table header
    fprintf(pointer_to_the_output_file,"\n\n hex dec   ch   br_ch \n\n\n");

    // display of visible characters
    for(i=32;i<NUM_OF_ASCII_CHARACTERS;i++) {
        if( arr_for_ch_occurrences[i] ) { // if the number of occurrences of the i-th character is greater than zero
            printf("  %x %3d    %c %7d \n\n", i, i, i, arr_for_ch_occurrences[i] );
            fprintf(pointer_to_the_output_file,"  %x %3d    %c %7d \n\n", i, i, i, arr_for_ch_occurrences[i] );
        }
    }

    // closing the input file
    if( ( fclose(pointer_to_the_input_file) ) == EOF ) {    // close the input file
        fprintf(stderr, "\n\n Error closing input file %s ! \n\n", input_file_name );
        exit(EXIT_FAILURE);
    }
    else
    printf("\n Input file \n %s \n successfully closed. \n", input_file_name );

    // closing the output file
    if( ( fclose(pointer_to_the_output_file) ) == EOF ) {   // close the output file
        fprintf(stderr, "\n\n Error closing output file %s ! \n\n", output_file_name );
        exit(EXIT_FAILURE);
    }
    else
    printf("\n Output file \n %s \n successfully closed. \n\n", output_file_name );


    system("PAUSE");
    return 0;
}