Question

#include <errno.h>

#include <stdbool.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

/*

* Expected usage:

* ./wc <words | lines> <file>

*

* If argv[1] is "words", then you should count the number of words. If it

* is "lines", then you should count the number of lines.

*

* For example:

* $ cat a.txt

* a b c d

* $ ./wc words a.txt

* 4

* $ ./wc lines a.txt

* 1

*

* YOUR PROGRAM MUST COMPILE CLEANLY WITH: gcc -o wc wc.c -Wall -pedantic

*/

/*

* This should return the number of spaces in the buffer using the isspace

* function.

*/

static size_t

words(const char* buffer, size_t length)

{

size_t sum = 0;

return sum;

}

/*

* This should return the number of lines in the buffer by checking for the

* existence of '\n' characters in the buffer.

*/

static size_t

lines(const char* buffer, size_t length)

{

size_t sum = 0;

return sum;

}

int

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

{

char buffer[256];

FILE* fp;

size_t bytes_read;

size_t sum = 0;

enum {

MODE_LINES,

MODE_WORDS

} mode;

bool middle = false;

if (argc != 3) {

printf("Usage: ./wc <words | lines> <file>\n");

exit(EXIT_FAILURE);

}

/*

* Set mode here based on the value of argv[1]. Use the

* strcmp function for string comparison.

*/

fp = fopen(argv[2], "r");

if (fp == NULL) {

printf("error: could not open %s: %s\n",

argv[1], strerror(errno));

exit(EXIT_FAILURE);

}

for (;;) {

bytes_read = fread(buffer, 1, sizeof(buffer), fp);

if (bytes_read == 0)

break;

if (mode == MODE_LINES) {

sum += lines(buffer, bytes_read);

}

else if (mode == MODE_WORDS) {

sum += words(buffer, bytes_read);

}

}

if (argc != 3) {

printf("Usage: ./wc <words | lines> <file>\n");

exit(EXIT_FAILURE);

}

/*

* Set mode here based on the value of argv[1]. Use the

* strcmp function for string comparison.

*/

fp = fopen(argv[2], "r");

if (fp == NULL) {

printf("error: could not open %s: %s\n",

argv[1], strerror(errno));

exit(EXIT_FAILURE);

}

for (;;) {

bytes_read = fread(buffer, 1, sizeof(buffer), fp);

if (bytes_read == 0)

break;

if (mode == MODE_LINES) {

sum += lines(buffer, bytes_read);

}

else if (mode == MODE_WORDS) {

sum += words(buffer, bytes_read);

}

}

/*

* You need to increment sum if you were in the middle of a line or word and end of

* file was hit.

*/

printf("%zu\n", sum + middle);

return 0;

}

Please solve the Bolded Questions usong the C Language.

Thanks!

Answer 1

Screenshots

CODE:

#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

/*
* This should return the number of spaces in the buffer using the isspace
* function.
*/
static size_t words(const char* buffer, size_t length)
{
  
   size_t sum = 0;
   int i;
   for(i=0; i<length; i++){
       if(isspace(buffer[i])){
           sum++;
       }
   }
   return sum;

}

/*
* This should return the number of lines in the buffer by checking for the
* existence of '\n' characters in the buffer.
*/
static size_t lines(const char* buffer, size_t length)
{
   size_t sum = 0;
   int i;
   for(i=0; i<length; i++){
       if(buffer[i]=='\n'){
           sum++;
       }
   }
   return sum;
}

int main(int argc, const char* argv[])
{
   char buffer[256];
   FILE* fp;
   size_t bytes_read;
   size_t sum = 0;
   enum {
       MODE_LINES,
       MODE_WORDS
   } mode;
   bool middle = false;

   if (argc != 3) {
       printf("Usage: ./wc <words | lines> <file>\n");
       exit(EXIT_FAILURE);
   }

   /*
   * Set mode here based on the value of argv[1]. Use the
   * strcmp function for string comparison.
   */

   if(strcmp(argv[1],"words") == 0)
       mode = MODE_WORDS;
   else if(strcmp(argv[1],"lines") == 0)
       mode = MODE_LINES;
   else{
       printf("Usage: ./wc <words | lines> <file>\n");
       exit(EXIT_FAILURE);
   }

   fp = fopen(argv[2], "r");
   if (fp == NULL) {
       printf("error: could not open %s: %s\n",
           argv[1], strerror(errno));
       exit(EXIT_FAILURE);
   }

   for (;;) {
       bytes_read = fread(buffer, 1, sizeof(buffer), fp);
       if (bytes_read == 0)
           break;

       if (mode == MODE_LINES) {
           sum += lines(buffer, bytes_read);
       }
       else if (mode == MODE_WORDS) {
           sum += words(buffer, bytes_read);
       }
   }

   /*
   * You need to increment sum if you were in the middle of a line or word and end of
   * file was hit.
   */

   if (feof(fp) == 0){
       middle = true;
   }

   printf("%zu\n", sum + middle);
   return 0;
}