20151208-4：条件断点和全局变量的watchpoint的设置

Here are some other things can do with breakpoints:

· Set a conditional breakpoint（条件断点）:

（1）右键断点标记出现菜单Right-click on a breakpoint marker to bring up a contextual menu,and
（2）选择断点属性(breakpoint properties)choose Breakpoint Properties to display a properties dialog box
（3）选择（common）Click the Common option in the left panel and
（4）编辑条件表达式enter a C/XC conditional expression in the Condition text box in the right panel. （条件表达式可以包含断点范围内的任意变量）The expression can contain any variables in the scope of the breakpoint.

· Set a watch point on a global variable（全局变量的watch point）:

A watch point is a special breakpoint that suspends execution whenever the value of an expression changes(without specifying where it might happen).

（1）右键Breakpoint view区域的任意地方Right-click anywhere in the Breakpoints view and choose
（2）加上Add Watchpoint. Add Watchpoint C/XC from the contextual menu.
（3）加入表达式 Enter aC/XC expression in the dialog box, for example a[MAX].

Select Write to break when the expression is written, and Read to break when the expression is read.

1：在Debug模式下window->showwindow->Breakpoints
2：点击Breakpoints view的右上角（红圈内的倒三角），选择Add watchpoint
3：Select Write to break when theexpression is written, and Read to break when the expression is read.注意watchpoint只对全局变量设置。

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