Question

C Code

Edit this code to make it output all unique letters IN LOWERCASE of an input file.

For example, with this input:

Raspberry Grapefruit Straw berry raspBERRY

Blue$$berry apple Pine_apple raspberry

The output should be:

raspberry

grapefruit

straw

berry

blue

berry

apple

pine

NOTE: Words with different capitlization, like raspberry and raspBERRY count as 1 unique word, so raspberry should only be seen once in the output.

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

int main()
{
    //Pointer to access the file.
   FILE *file_ptr;

   //string to read each word.
   char word[100];

   // To open the file.
   file_ptr = fopen("input_text.txt", "r");
   if (file_ptr == NULL)
   {
       printf("No such file exist in current folder \n");
       exit(0);
   }

   //To read the file .
   while ( fscanf(file_ptr, "%s", word) != EOF)
   {
        printf("Word (%ld): ",strlen(word));
       printf ("%s\n", word);
   }
  
   //Close the file.
   fclose(file_ptr);
   return 0;
}

Answer 1

Please let me know if anything is required.

NOTE: The above output contain berry twice which is wrong.

Copyable code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main()
{
//Pointer to access the file.
FILE *file_ptr;

//string to read each word.
char word[100];
char uniq_word[100][100];
int f;

// To open the file.
file_ptr = fopen("input_text.txt", "r");
if (file_ptr == NULL)
{
printf("No such file exist in current folder \n");
exit(0);
}

//To read the file .
int w=0;
while ( fscanf(file_ptr, "%s", word) != EOF)
{
char temp[strlen(word)];//to store the temperory word
temp[0] = '\0';
for(int i=0;i<strlen(word);i++)
{
char c=tolower(word[i]);//converting each character to lower case to ignore case
if(c>='a' && c<='z') //condition for only character not any other characters like $,_
{
strncat(temp,&c,1);//adding the character to the temperory string
  
}
else
{
f=0; //if any special character ignoring it and starting as a new string
//condition for the word is not repeated
if(strlen(temp)>0) // if the word length is greater than 0
{
for(int k=0;k<w;k++)
{
  
if(strcmp(uniq_word[k],temp)==0) ///if the word repeated
{
f=1;
}
  
}
  
if(f==0)
{
strcpy(uniq_word[w++],temp);//if the word not repeated
}
}
  
temp[0] = '\0';
  


}

}
f=0;
//condition for the word is not repeated
if(strlen(temp)>0)
{
for(int k=0;k<w;k++)
{
  
if(strcmp(uniq_word[k],temp)==0)//if the word repeated
{
f=1;
}
  
}
  
if(f==0)
{
strcpy(uniq_word[w++],temp);//if the word is not repeated
}
  
}

}
//printing the results
for(int i=0;i<w;i++)
{
printf("%s\n",uniq_word[i]);
}
  
//Close the file.
fclose(file_ptr);
return 0;
}

Sample output:

new code as per comment:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
int main()
{
//Pointer to access the file.
FILE *file_ptr;

//string to read each word.
char word[100];
char uniq_word[100][100];
int f;

// To open the file.
file_ptr = fopen("input_text.txt", "r");
if (file_ptr == NULL)
{
printf("No such file exist in current folder \n");
exit(0);
}

//To read the file .
int w=0;
while ( fscanf(file_ptr, "%s", word) != EOF)
{
char temp[strlen(word)];//to store the temperory word
temp[0] = '\0';
for(int i=0;i<strlen(word);i++)
{
char c=tolower(word[i]);//converting each character to lower case to ignore case
if(c>='a' && c<='z') //condition for only character not any other characters like $,_
{
strncat(temp,&c,1);//adding the character to the temperory string
  
}
else
{
f=0; //if any special character ignoring it and starting as a new string
//condition for the word is not repeated
// if(strlen(temp)>0) // if the word length is greater than 0
{
for(int k=0;k<w;k++)
{
  
if(strcmp(uniq_word[k],temp)==0) ///if the word repeated
{
f=1;
}
  
}
  
if(f==0)
{
strcpy(uniq_word[w++],temp);//if the word not repeated
}
}
  
temp[0] = '\0';
  


}

}
f=0;
//condition for the word is not repeated
// if(strlen(temp)>0)
{
for(int k=0;k<w;k++)
{
  
if(strcmp(uniq_word[k],temp)==0)//if the word repeated
{
f=1;
}
  
}
  
if(f==0)
{
strcpy(uniq_word[w++],temp);//if the word is not repeated
}
  
}

}
//printing the results
for(int i=0;i<w;i++)
{
printf("%s\n",uniq_word[i]);
}
  
//Close the file.
fclose(file_ptr);
return 0;
}

Sample output: