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#include ‹stdio.h›
#define MAXLINE 1000 /* максимальный размер вводимой строки */
 
int getline(char line[], int MAXLINE);
void copy(char to[], char from[]);
 
/* печать самой длинной строки */
main()
{
	int len; /* длина текущей строки */
	int max; /* длина максимальной из просмотренных строк */
	char line[MAXLINE]; /* текущая строка */
	char longest[MAXLINE]; /* самая длинная строка */
 
	max = 0;
 
	while (len = getline(line, MAXLINE)) › 0)
		if (len › max) {
			max = len;
			copy(longest, line);
		}
	if (max › 0) /* была ли хоть одна строка? */
		printf("%s", longest);
	return 0;
}
 
/* getline: читает строку в s, возвращает длину */
int getline(char s[], int lim)
{
	int c, i;
	for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
		s[i] = c;
	if (c == '\n') {
		s[i] = c;
		++i;
	}
	s[i] = '\0';
	return i;
}
 
/* copy: копирует из 'from' в 'to'; to достаточно большой */
void copy(char to[], char from[])
{
	int i;
	i = 0;
	while ((to[i] = from[i]) != '\0')
		++i;
}

prog.c:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include ‹stdio.h›
          ^
prog.c:2:17: error: expected ‘;’, ‘,’ or ‘)’ before numeric constant
 #define MAXLINE 1000 /* максимальный размер вводимой строки */
                 ^
prog.c:4:30: note: in expansion of macro ‘MAXLINE’
 int getline(char line[], int MAXLINE);
                              ^~~~~~~
prog.c:8:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
 main()
 ^~~~
prog.c: In function ‘main’:
prog.c:17:15: warning: implicit declaration of function ‘getline’ [-Wimplicit-function-declaration]
  while (len = getline(line, MAXLINE)) › 0)
               ^~~~~~~
prog.c:17:2: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  while (len = getline(line, MAXLINE)) › 0)
  ^~~~~
prog.c:17:39: error: stray ‘\342’ in program
  while (len = getline(line, MAXLINE)) › 0)
                                       ^
prog.c:17:40: error: stray ‘\200’ in program
  while (len = getline(line, MAXLINE)) › 0)
                                        ^
prog.c:17:41: error: stray ‘\272’ in program
  while (len = getline(line, MAXLINE)) › 0)
                                         ^
prog.c:17:43: warning: statement with no effect [-Wunused-value]
  while (len = getline(line, MAXLINE)) › 0)
                                           ^
prog.c:17:44: error: expected ‘;’ before ‘)’ token
  while (len = getline(line, MAXLINE)) › 0)
                                            ^
prog.c:17:2: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation]
  while (len = getline(line, MAXLINE)) › 0)
  ^~~~~
prog.c:17:44: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’
  while (len = getline(line, MAXLINE)) › 0)
                                            ^
prog.c:17:44: error: expected statement before ‘)’ token
prog.c:18:11: error: stray ‘\342’ in program
   if (len › max) {
           ^
prog.c:18:12: error: stray ‘\200’ in program
   if (len › max) {
            ^
prog.c:18:13: error: stray ‘\272’ in program
   if (len › max) {
             ^
prog.c:18:15: error: expected ‘)’ before ‘max’
   if (len › max) {
               ^~~
prog.c:22:10: error: stray ‘\342’ in program
  if (max › 0) /* была ли хоть одна строка? */
          ^
prog.c:22:11: error: stray ‘\200’ in program
  if (max › 0) /* была ли хоть одна строка? */
           ^
prog.c:22:12: error: stray ‘\272’ in program
  if (max › 0) /* была ли хоть одна строка? */
            ^
prog.c:22:14: error: expected ‘)’ before numeric constant
  if (max › 0) /* была ли хоть одна строка? */
              ^
prog.c:23:3: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
   printf("%s", longest);
   ^~~~~~
prog.c:23:3: warning: incompatible implicit declaration of built-in function ‘printf’
prog.c:23:3: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
prog.c: In function ‘getline’:
prog.c:31:16: error: stray ‘\342’ in program
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                ^
prog.c:31:17: error: stray ‘\200’ in program
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                 ^
prog.c:31:18: error: stray ‘\271’ in program
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                  ^
prog.c:31:20: error: expected ‘;’ before ‘lim’
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                    ^~~
prog.c:31:55: error: stray ‘\321’ in program
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                                                       ^
prog.c:31:56: error: stray ‘\201’ in program
  for (i = 0; i ‹ lim-1 && (c = getchar()) != EOF && с != '\n'; ++i)
                                                        ^

Standard output is empty