Question

求会C语言和JAVA语言的朋友，帮忙将这段JAVA程序改成C程序

import java.io.*;
public class Pretty
{
public static final int LINE_SIZE = 5;

public static void main(String[] parms)
{
BufferedReader fileIn;
PrintWriter fileOut;
String inputLine;
int position;

try
{
fileIn = new BufferedReader(new FileReader("in.txt"));
fileOut = new PrintWriter(new FileWriter("out.txt"));

inputLine = fileIn.readLine();
position = 1;
while (inputLine != null)
{
if (inputLine.equals(""))
{
if (position > 1)
{
fileOut.println();
}

fileOut.println();
position = 1;
}

else
{
if ((position+inputLine.length()-1) > LINE_SIZE)
{
fileOut.println();
position = 1;
}
fileOut.print(inputLine);

position += inputLine.length();
if (position <= LINE_SIZE)
{ // add a blank after the current word
fileOut.print(" ");
position++;
}
}

inputLine = fileIn.readLine();
}

fileIn.close();
fileOut.close();
}

catch (IOException ioe)
{
System.out.println(ioe.getMessage());
ioe.printStackTrace();
}
}
}
最好是按照JAVA写出来的方法来写，也就是说，这段java程序用的算法是什么，C也用什么样的算法，谢谢

c语言，不是c++，也不是c#

Answer 1

#include "stdio.h"
#include "string.h"

#define LINE_SIZE 5
#define MAX_LINE_SIZE 50 /* 可自己修改 */

int main(int args, char *argv[])
{
FILE *fileIn = NULL;
FILE *fileOut = NULL;
int position = 1;
char inputLine[MAX_LINE_SIZE + 1];
char outputLine[MAX_LINE_SIZE + 2]; /* 增加一个空格，后面增加的 */

/* 打开文件in.txt */
if ((fileIn = fopen("in.txt", "rb")) == NULL)
{
printf("Cannot open file in.txt.\n");
return -1;
}
/* 打开文件out.txt */
if ((fileOut = fopen("out.txt", "wb")) == NULL)
{
printf("Cannot open file in.txt.\n");
return -1;
}

/* 一行行读取并写入文件out.txt中 */
while ((fgets(inputLine, MAX_LINE_SIZE, fileIn)) != NULL)
{
memset(outputLine, 0, MAX_LINE_SIZE + 2);
strncpy(outputLine, inputLine, strlen(inputLine) - 2); /* 不保留换行符 */

if (strlen(outputLine) == 0) /* 空行 */
{
if (position > 1)
{
fputs("\r\n", fileOut);
}
fputs("\r\n", fileOut);
position = 1;
}
else
{
if ((position + strlen(outputLine) - 1) > LINE_SIZE)
{
fputs("\r\n", fileOut);
position = 1;
}

fputs(outputLine, fileOut);

printf("%s\n", outputLine);

position += strlen(outputLine);
if (position <= LINE_SIZE) {
// add a blank after the current word
fputs(" ", fileOut);
position++;
}
}
}

fclose(fileIn);
fileIn = NULL;
fclose(fileOut);
fileOut = NULL;

return 0;
}

Answer 2

好长啊,怎么看

Answer 3

C++还是C#？