这个小测试有助于查明我的程序问题。现在发生了一件奇怪的事情：第三个也是最后一个[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
被跳过，紧随其后的测试行为import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
public class LabelImageText extends JPanel
{
public LabelImageText()
{
JLabel label1 = new JLabel( new ColorIcon(Color.ORANGE, 100, 100) );
label1.setText( "Easy Way" );
label1.setHorizontalTextPosition(JLabel.CENTER);
label1.setVerticalTextPosition(JLabel.CENTER);
add( label1 );
//
JLabel label2 = new JLabel( new ColorIcon(Color.YELLOW, 200, 150) );
label2.setLayout( new BoxLayout(label2, BoxLayout.Y_AXIS) );
add( label2 );
JLabel text = new JLabel( "More Control" );
text.setAlignmentX(JLabel.CENTER_ALIGNMENT);
label2.add( Box.createVerticalGlue() );
label2.add( text );
label2.add( Box.createVerticalStrut(10) );
//
JLabel label3 = new JLabel( new ColorIcon(Color.GREEN, 200, 150) );
label3.setLayout( new GridBagLayout() );
add( label3 );
JLabel text3 = new JLabel();
text3.setText("<html><center>Text<br>over<br>Image<center></html>");
text3.setLocation(20, 20);
text3.setSize(text3.getPreferredSize());
label3.add( text3 );
//
JLabel label4 = new JLabel( new ColorIcon(Color.CYAN, 200, 150) );
add( label4 );
JTextPane textPane = new JTextPane();
textPane.setText("Add some text that will wrap at your preferred width");
textPane.setEditable( false );
textPane.setOpaque(false);
SimpleAttributeSet center = new SimpleAttributeSet();
StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
StyledDocument doc = textPane.getStyledDocument();
doc.setParagraphAttributes(0, doc.getLength(), center, false);
textPane.setBounds(20, 20, 75, 100);
label4.add( textPane );
}
public static class ColorIcon implements Icon
{
private Color color;
private int width;
private int height;
public ColorIcon(Color color, int width, int height)
{
this.color = color;
this.width = width;
this.height = height;
}
public int getIconWidth()
{
return width;
}
public int getIconHeight()
{
return height;
}
public void paintIcon(Component c, Graphics g, int x, int y)
{
g.setColor(color);
g.fillRect(x, y, width, height);
}
}
private static void createAndShowUI()
{
JFrame frame = new JFrame("LabelImageText");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new LabelImageText() );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowUI();
}
});
}
}
输出值10。
scanf()最终打印返回cBoard[*tile]为10，无论之前的任务是什么。关于功能不正常void takeTurn(int *iap, int *tile, char *cap) {
printf("\n\tPRINT TEST Take Turn()\n");
if (*iap == 1) *cap == 'X';
if (*iap == 2) *cap == 'O';
printf("\nWhich tile would you like?");
printf("\n\tTEST the value of cBoard[0] is %c. At [3] is %c.\n1 ::", cBoard[0], cBoard[3]);
scanf("%c", &cBoard[0]);
//user inputs 'h'.
printf("\n\tTEST the value of cBoard[0] is now %c\n2 ::", cBoard[0]);
scanf("%d", tile);
//it prints
//TEST the value of cBoard[0] is now h
//user inputs 6. It prints
printf("\n\tTEST the value of cBoard[%d] is %d.\n3 ::", *tile, cBoard[*tile]+1);
//it prints
//TEST the value of cBoard[6] is 1.
scanf("%c", &cBoard[*tile]);
//This scanf() does not run.
printf("\n\tTEST the value of cBoard[%d] is %d.\n", *tile, cBoard[*tile]);
//it prints
//TEST the value of cBoard[6] is 10.
...
}
的一些事情必须将新值设置为10.
发生了什么事？
答案 0 :(得分：4)
scanf("%d", tile);读取一个数字，但将'\n'留在标准输入缓冲区中。下一个读取操作scanf("%c", &cBoard[*tile]);读取此字符，该字符恰好具有ASCII中的值10。您可以通过忽略字符前的空格来修复行为：
scanf(" %c", &cBoard[*tile]); // notice the space before the %c
另请注意，您应检查scanf的返回值，以验证是否提供了正确的输入。