谢谢

/* Exercise 1-22. Write a program to "fold" long input lines into two or
 * more shorter lines,after the last non-blank character that occurs
 * before then 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.
 * 
 * ~svr
 *
 * [NOTE: Unfinished,but functional in a generic capacity]
 * Todo:
 * Handling of spaceless lines
 * Handling of lines consisting entirely of whitespace
 */

#include <stdio.h>
#define FOLD 25
#define MAX 200
#define NEWLINE '\n'
#define BLANK ' '
#define DELIM 5
#define TAB '\t'

int
main(void)
{
    int line  = 0,space = 0,newls = 0,i = 0,c = 0,j = 0;

    char array[MAX] = {0};

    while((c = getchar()) != EOF) {
        ++line;
        if(c == NEWLINE)
            ++newls;
        if((FOLD - line) < DELIM) {
            if(c == BLANK) {
                if(newls > 0) {
                    c = BLANK;
                    newls = 0;
                }
                else
                    c = NEWLINE;
                line = 0;
            }
        }
        array[i++] = c;
    }
    for(line = 0; line < i; line++) {
        if(array[0] == NEWLINE)
            ;
        else
            printf("%c",array[line]);
    }
    return 0;
}