1-16 修改打印最长文本行的程序的主程序main，使之可以打印任意长度的输入行的长度，并尽可能多地打印文本

/*修改打印最长文本行的程序的主程序main，使之可以打印任意长度的输入行的长度，并尽可能多地打印文本*/
#include <stdio.h>
#define MAXLINE 1000
int getline(char line[], int maxline);
void copy(char to[], char from[]);
main()
{
int len; /* current line length */
char line[MAXLINE]; /* current input line */
char longest[MAXLINE]; /* longest line saved here */
while ((len = getline(line, MAXLINE)) > 0) {
printf("输入行的长度:%d\n", (len - 1));
copy(longest, line);
printf("%s", longest);
}
return 0;
}
/* getline: read a line into s, return length */
int getline(char s[], int lim)
{
int c, i;
for (i = 0; i < lim-1 && (c = getchar()) != EOF && c != '\n'; ++i)
s[i] = c;
if ( c == '\n') {
s[i] = c;
++i;
}
s[i] = '\0';
return i;
}/* copy: copy 'from' into 'to'; assume to is big enough */
void copy(char to[], char from[])
{
int i;
i = 0;
while ((to[i] = from[i]) != '\0')
++i;
}