Question

Write a C program to run on ocelot to read a text file and print it to the display. It should optionally find the count of the number of words in the file, and/or find the number of occurrences of a substring, and/or take all the words in the string and sort them lexicographically (ASCII order). You must use getopt to parse the command line. There is no user input while this program is running.

Usage: mywords [-cs] [-f substring] filename

• The -c flag means to count the number of words in the file. A word would be a series of characters separated by spaces or punctuation. A word could include a hyphen or a single apostrophe.

• The -s option means to print the words in the file sorted by ASCII order.

• The -f option will find the number of occurrences of the given substring.

• You may have any number of the flags included or none of them.

• The order they should be run would be: -s first, -c second, and -f third.

• Output should be well formatted and easy to read.

Please do not copy and paste a code asked in chegg.

Answer 1

The C code:

#include<stdio.h>
#include <string.h>
#include<stdlib.h>
#define n 10000
#define OUT 0
#define IN 1

void search_occ(char *word, char *all_str){

int v=0, m=0, times=0, len;
len = strlen(word);
while(all_str[v] != '\0') {
if(all_str[v] == word[m]) {
while(all_str[v] == word[m] && all_str[v] !='\0') {
v++;
m++;
}
if(m == len && (all_str[n] == ' ' || all_str[v] == '\0')) {
times++;
}
} else {
while(all_str[v] != ' ') {
v++;
if(all_str[v] == '\0')
break;
}
}
v++;
m=0;
}
if(times > 0) {
printf("\n'%s' appears %d time(s)\n", word, times);
} else {
printf("\n'%s' does not appear in the sentence.\n", word);
}
}

void all_words(char *str1,int num_words){

int i, j, c = 0;
char temp[50], *split_str, str[num_words][20];
split_str = strtok (str1," ,.-");

while (split_str != NULL){
strcpy(str[c], split_str);
split_str = strtok (NULL, " ,.-");
c++;
}
for(i=1;i<num_words;i++){
for(j=1;j<=num_words-i;j++){
if(strcmp(str[j-1],str[j])>0){
strcpy(temp,str[j-1]);
strcpy(str[j-1],str[j]);
strcpy(str[j],temp);
}
}
}
printf("\n\n Sorted Order \n");
for(i=0; i<10; ++i){
puts(str[i]);
}
printf("\n\n");
}

unsigned countWords(char *str){
int state = OUT;
unsigned wc = 0;
while (*str){
if (*str == ' ' || *str == '\n' || *str == '\t')
state = OUT;
else if (state == OUT){
state = IN;
++wc;
}
++str;
}
return wc;
}

int main(){
char buff[n], search_str[100];
FILE *file;
size_t nread;
int i, num_of_words;

file = fopen("test.txt", "r");
if (file) {
printf("File Content...\n\n");
while ((nread = fread(buff, 1, sizeof buff, file)) > 0)
fwrite(buff, 1, nread, stdout);
if (ferror(file)) {
printf("Error....");
}
fclose(file);
}
num_of_words = countWords(buff);
all_words(buff, num_of_words);
printf("\n\n Number of words-->>%d\n\n", num_of_words);

printf("Enter word to search->");
scanf("%s[^\n]",search_str);

search_occ(search_str, buff);

}

You can run this code and get the desired output.

Important: Before executing the code, create a file name file.txt in that folder only and type the test for which you want to get the desired output.