上面这样会引起编译代码长度变长的！其实i不会在其他地方改变
看了下手册好象没有很好解决办法！
只有几种固有的选项！
#pragma optimize=param[ param...]
Parameters
balanced|size|speed Optimizes balanced between speed and size,
optimizes for size, or optimizes for speed
none|low|medium|high Specifies the level of optimization
no_code_motion Turns off code motion
no_cse Turns off common subexpression elimination
no_inline Turns off function inlining
no_tbaa Turns off type-based alias analysis
no_unroll Turns off loop unrolling
no_scheduling Turns off instruction scheduling
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楼主
