Question

6. Write a program to read a text file and produce another text file in which all lines are less than some given length. Make sure and break lines in sensible places; for example, avoid breaking words or putting isolated punctuation marks at the beginning of a line.

Please finish the question in C language programming, thank you!

Answer 1

before running this program create the two text files and enter them along with their extension when asked at the console.

#include <stdio.h>
#include <stdlib.h> // For exit()

int main()
{
FILE *frd;
FILE *fwrite;

int char_count;
int length;
int i;
int temp,temp2;
char filename[100], filename1[100],*C;

printf("Enter the filename to open \n");
scanf("%s", filename);
printf("Enter the max line size(no of chars) \n");
scanf("%d",&char_count);
printf("Enter the filename to write the output \n");
scanf("%s", filename1);

// Open input file
frd = fopen(filename, "r");
//Open output file
fwrite = fopen(filename1, "w");
       //handle the case when input or output file does not exist.
if (frd == NULL||(fwrite == NULL))
{
printf("Cannot open file \n");
exit(0);
}

//start reading from input file
if (frd)
{
fseek (frd, 0, SEEK_END);
length = ftell (frd);
fseek (frd, 0, SEEK_SET);
C = malloc (length);
if (C)
{
fread (C, 1, length, frd);
}
fclose (frd);
}

//C stores the content of entire file
//traverse the string from the begining

temp2 =0; // temp2 will keep track of the character in each line
for(i=0;i<=(strlen(C));i++)
{
temp2++;
   if(temp2 == char_count+1)
   {
       C[temp]='\n';
       temp2 =i - temp;
       }

else if(C[i]==' ')
{
   temp =i;
}

}

//write the contents to the file
fprintf(fwrite,C);
  
return 0;
}

// Also note that the filename should be less than 100.