小编Gig*_*cka的帖子

我正在学习C,而且我来自Java背景.如果我能得到一些指导,我将不胜感激.这是我的代码:

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>

int main(void)
{
    char *str = "test text\n";
    FILE *fp;

    fp = fopen("test.txt", "a");
    write(fp, str);
}

void write(FILE *fp, char *str)
{
    fprintf(fp, "%s", str);
}

当我尝试编译时,我收到此错误:

xxxx.c: In function ‘main’:
xxxx.c:18: warning: passing argument 1 of ‘write’ makes integer from pointer without a cast
/usr/include/unistd.h:363: note: expected ‘int’ but argument is of type ‘struct FILE *’
xxxx.c:18: error: too few arguments to function ‘write’
xxxx.c: At top level:
xxxx.c:21: …

对不起第一次在这里问一个问题.

如果我有这样的2D数组:

int[][] array2d = {{1, 2, 3}, {6, 7, 8}};

如何添加多个这样的1D数组:

int[] array1d = {3, 2, 1};
int[] array1d2 = {8, 7, 6};

所以我原来的2d数组变成了这个:

int[][] array2d = {{1, 2, 3}, {6, 7, 8}, {3, 2, 1}, {8, 7, 6}};

注意:这是为了在按下按钮时将信息从JTextfield添加到JTable中.因此,2d数组将用作表中的数据.如果有更好的方法来实现这一点,我也会很感激.=)

这是我的代码:

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*;

 class Test{ 
        static CardLayout cardLayout;  
        static JPanel card = new JPanel();

        public static void main(String[] args) {
            JFrame frame = new JFrame("AddressBook");
            JPanel contentPane = (JPanel)frame.getContentPane();
            card.setLayout(cardLayout = new CardLayout());                          

            JPanel cardTop = new JPanel();
            DefaultTableModel model = new DefaultTableModel();
            model.addColumn("Name");
            model.addColumn("Number");
            String[] John = {"John", "1234"};
            model.addRow(John);
            String[] Beth = {"Beth", "4444"};
            model.addRow(John);
            JTable table = new JTable(model);       
            JScrollPane jsp = new JScrollPane(table);
            cardTop.add(jsp);


            card.add("Card Top", cardTop);
            contentPane.add(card);

            frame.setVisible(true);
            frame.setSize(507, 191);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); …