chocokeki

///////////
★★★C method 1
///////////
#include <stdio.h>
#include <stdlib.h>

#define INPUT_FILE_1 "hw1_in1"
#define OUTPUT_FILE_1 "hw1_out1"

void ReadFile();
void WriteFile();
void ParseLine(char * pLineBuf);

int main()
{

 printf("\n\n");
 printf("%s : file read\n", INPUT_FILE_1);
 printf("====================================\n");
 
 ReadFile();
 
 printf("\n\n");
 printf("%s : file write\n", OUTPUT_FILE_1);
 printf("====================================\n");
 
 WriteFile();

 printf("\n\n");
 return 0;
}

void ReadFile()
{
 char buf[256];
 FILE * fp;

 fp = fopen(INPUT_FILE_1, "r");
 
 if (fp == NULL)
 {
  printf("%s file open error\n", INPUT_FILE_1);
  exit(0);
 }

 while(!feof(fp))
 {
  fgets(buf, sizeof(buf), fp);

  ParseLine(buf);
 }
 
 fclose(fp);
}

void WriteFile()
{
 int i;
 float f;
 char buf[256];
 FILE * fp;

 fp = fopen(OUTPUT_FILE_1, "w");
 
 if (fp == NULL)
 {
  printf("%s file open error\n", INPUT_FILE_1);
  exit(0);
 }

 fprintf(fp, "---------------------------------\n");
 fprintf(fp, " %s file write test\n", OUTPUT_FILE_1);
 fprintf(fp, "---------------------------------\n");
 
 f = 0.0;
 
 for (i = 0; i < 5; i++)
 {
  fprintf(fp, " %.2f\t%.2f\t%.2f\n", f + 1, f + 1, f + 1);
  f++;
 }
 
 fclose(fp);
}

// 이 함수에서 파싱을 합니다
void ParseLine(char * pLineBuf)
{
 printf("%s", pLineBuf);

}

C++
http://www.cplusplus.com/reference/iostream/ifstream/open.html

this is reference and easy to use

#include

ofstream output;
output.open("filename" ios::out | ios::trunc);


if(output.is_open())
output << "anything if you wanna";

 

/*-
 * Copyright (c) 1990, 1993
 * The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fgets.c 8.2 (Berkeley) 12/22/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdio/fgets.c,v 1.14 2007/01/09 00:28:06 imp Exp $");

#include "namespace.h"
#include <stdio.h>
#include <string.h>
#include "un-namespace.h"
#include "local.h"
#include "libc_private.h"

/*
 * Read at most n-1 characters from the given file.
 * Stop when a newline has been read, or the count runs out.
 * Return first argument, or NULL if no characters were read.
 */
char *
fgets(buf, n, fp)
 char *buf;
 int n;
 FILE *fp;
{
 size_t len;
 char *s;
 unsigned char *p, *t;

 if (n <= 0)  /* sanity check */
  return (NULL);

 FLOCKFILE(fp);
 ORIENT(fp, -1);
 s = buf;
 n--;   /* leave space for NUL */
 while (n != 0) {
  /*
   * If the buffer is empty, refill it.
   */
  if ((len = fp->_r) <= 0) {
   if (__srefill(fp)) {
    /* EOF/error: stop with partial or no line */
    if (s == buf) {
     FUNLOCKFILE(fp);
     return (NULL);
    }
    break;
   }
   len = fp->_r;
  }
  p = fp->_p;

  /*
   * Scan through at most n bytes of the current buffer,
   * looking for '\n'.  If found, copy up to and including
   * newline, and stop.  Otherwise, copy entire chunk
   * and loop.
   */
  if (len > n)
   len = n;
  t = memchr((void *)p, '\n', len);
  if (t != NULL) {
   len = ++t - p;
   fp->_r -= len;
   fp->_p = t;
   (void)memcpy((void *)s, (void *)p, len);
   s[len] = 0;
   FUNLOCKFILE(fp);
   return (buf);
  }
  fp->_r -= len;
  fp->_p += len;
  (void)memcpy((void *)s, (void *)p, len);
  s += len;
  n -= len;
 }
 *s = 0;
 FUNLOCKFILE(fp);
 return (buf);
}

'string.h'에 정의된 strtok() 함수가 있습니다.

예제를 보자면

char string[] = "words separated by spaces -- and, punctuation!";
const char delimiters[] = " .,;:!-";
char *token;

token = strtok (string, delimiters); /* token => "words" */
token = strtok (NULL, delimiters); /* token => "separated" */
token = strtok (NULL, delimiters); /* token => "by" */
token = strtok (NULL, delimiters); /* token => "spaces" */
token = strtok (NULL, delimiters); /* token => "and" */
token = strtok (NULL, delimiters); /* token => "punctuation" */
token = strtok (NULL, delimiters); /* token => NULL */


위의 예제에서 delimiters[] 에 설정된 문자들이 구분자로 사용됨을 알수 있습니다.

공백문자마다 쪼개고 싶다면 delimiters[] = " " 라고 사용하시면 됩니다.








#include <iostream>
#include <sstream>
#include <string>
using namespace std;
//istringstream::str

int main () {

  int val,n;

  istringstream iss;
  string strvalues = "32 240 2 1450";

  iss.str (strvalues);

  for (n=0; n<4; n++)
  {
    iss >> val;
    cout << val+1 << endl;
  }

  return 0;
}

1
#include <stdio.h>

int main(void)
{
 printf("\nsigned  int  min: %d",1<<(sizeof(int)*8-1));
 printf("\nsigned  int  max: %d",~(1<<(sizeof(int)*8-1)));
 printf("\nunsigned int max: %u",~0);
 return 0;
}

해결

클래스안에서 ->data로 가면 멤버는 주소로  접근이 될까 아니면
직접 접근이 될까?

ex> tail->data!='s' 이런게 가능할까?

data를 리턴하고 싶으면


return tail->prev->data 로 될까 아니면 &로 객체를 넘겨줘야할까?  /////&안해도 됨
그리고 객체 자체가 리턴이 되는듯.

ex>>

class t
{
private:
 class nt
 {public:     char ch;      nt* next;
 };


char t::print()
{ return head->next->ch; }

void t::in(char a)
{head->next->ch=a;}

t test;    test.in(ta[0]);
char tmp=test.print();
cout <<tmp;

class에서 다른 클래스를 선언해서 사용해야만 할때

내가 찾아낸 방법;
private에서 pointer선언후
생성자에서 생성시켜서 주소를 먹고튄다

다른 방법
private에서 직접 생성을 시킨다 -_-;;;;;
exx>>

tree.h 
stack<child*> stkt;
stack<child*>* stktree;

tree.cpp
stktree=&stkt;

이거 그냥 포인터 안쓰고 바로 해도 될꺼같은데

집터를 옮길지 그대로 안주해 있을지는 아직 미정인 상태...

새집이 몸에 맞는지 몸을 새집에 맞게 늘려야 하는지 우선 봐야겠다..