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Write a program to "fold" long input lines into two or more shorter lines after the last non-blank character that occurs before the n -th column of input. Make sure your program does something intelligent with very long lines, and if there are no blanks or tabs before the specified column.
If i for example enter a tab, Do i have to count it as a number of x blank characters, depending on the tab stop? How exactly should i handle tabs?
I think you should handle it in that way as it makes sense to me.Quote:
Originally Posted by Tool
edit: fixed
What about the most 'intelligent' way to handle lines with no blanks/tabs before the nth column? What would be the best thing to do?
I was thinking about moving the whole array into right by one and inserting a new \n at that spot?
Be practical - how many words are there in the English lexicon that span a line about 1000 characters long :p
Tabs can be fun when you get into coding up your own editor. :p
For your assignment, I'd suggest making a tab equal to 8 blank spaces. That's a common default value for text editors, and yet keeps it simple.
Yeah, but i do want to handle this possibility aswell.Quote:
Originally Posted by itCbitC
Im working with a LINE_WIDTH constant, so lets say i want it to have a max line width 10, and some words are more then 10 chars long.
What would be the best option? To give a warning about it? I know its not that important... but still.
The way my program handles lines with no blank before the nth column is it reports an error and doesnt fold the line.
I seperated the program into 2 functions for simplicity:
--1. Getline - gets a line, replaces tabs with the proper number of blanks and takes care of overflow (MAX_SIZE)
--2. Fold_line -- folds the line based on LINE_WIDTH constant. if no blanks before the nth column returns 0 and reports an error.
If you guys think i did something wrong tell me. I think i did everything this exercise asks for, but if you think i can improve it somehow or take care of the long lines in a better way, id appreciate if you told me ;).
Code:#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 100
#define LINE_WIDTH 10
#define TAB_STOP 8
int Getline(char line[]) /* replaces tabs with the proper amounts of blanks & takes care of overflow */
{
int c, counter, x, y, tmp;
counter = x = y = tmp = 0;
while((c=getchar())!='\n')
{
if(c == EOF || x == MAX_SIZE - 2) return 0;
if(counter != TAB_STOP + 1) counter++;
else counter = 0;
if(c=='\t')
{
tmp = TAB_STOP+1 - counter;
for(y=0; y<tmp; y++) line[x++]=' ';
counter = 0;
}
else line[x++]=c;
}
line[x]='\n'; x++;
line[x]='\0';
return x;
}
int Fold_line(char line[], int x) /* folds lines, reports an error if there are no blanks before the nth column */
{
int pom=x;
int counter, blank_location, word_len;
counter = blank_location = word_len =0;
for(x=0; x<pom; x++)
{
if(line[x]==' ') { blank_location=x; word_len = 0; }
else word_len++;
if(counter == LINE_WIDTH+1 && word_len < LINE_WIDTH )
{
if(line[x]==' ') { line[x]='\n'; word_len=0; counter=0; }
else { line[blank_location]='\n'; counter = word_len; }
}
else if(counter >= LINE_WIDTH+1 && word_len >= LINE_WIDTH + 1) return 0;
counter++;
}
return 1;
}
int main(int argc, char *argv[])
{
int x=0;
int tmp=0;
char line[MAX_SIZE];
do{
if((x = Getline(line))==0) return 0;
if((tmp = Fold_line(line, x))==0) printf("Sequence of characters found without a blank before the %d. column.\n", LINE_WIDTH+1);
else printf("%s", line);
}while(x!=0);
printf("Press any key to continue\n\n");
getchar();
return 0;
}
Perhaps then see hyphenation which is used for wrapping long lines by breaking words into fragments.Quote:
Originally Posted by Tool
What about this input:
Basicaly, should i "discard" all the blanks/tabs before the next character after max LINE_WIDTH?Code:#define LINE_WIDTH 10
...
char line[40]=
"1234567890 test"
...
Fold_line(line);
Should i insert a \n right before test:
"1234567890 \ntest"
Or after the LINE_WIDTH spot:
"1234567890\n test"