vs2008 compiler and dubuger work in wrong way -

recently ,my vs2008 work in wrong way ,for instance :

 int avalue =30;   int tempvalue=avalue;   if (avalue>25) {   tempvalue =avalue+5; }  

running in debuger way,what has happen compiler, value of "avalue" change 35,i try time ,but there nothing happen.and restart vs2008 compiler ,the value of "avalue" 35.it work in fine way since restart computer. 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(148) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(150) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(155) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(156) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(157) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(158) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(161) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(162) : error c2065: “tower”: 未声明的标识符 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(162) : error c2059: 语法错误 : “>” 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(162) : error c2653: “tower”: 不是类或命名空间名称 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(163) : error c2143: 语法错误 : 缺少“)”(在“;”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(163) : error c2059: 语法错误 : “)” 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(164) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(168) : error c2143: 语法错误 : 缺少“)”(在“;”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(168) : error c2059: 语法错误 : “)” 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(169) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(172) : error c2065: “epoint”: 未声明的标识符 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(174) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(178) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(178) : error c2065: “bullet”: 未声明的标识符 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(178) : error c2065: “enemy”: 未声明的标识符 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(178) : error c2143: 语法错误 : 缺少“,”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(180) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(181) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(182) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(183) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(186) : error c2143: 语法错误 : 缺少“;”(在“{”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(188) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(189) : error c2143: 语法错误 : 缺少“;”(在“}”的前面) 1>e:\learnprj\towerdefence\towerdefence\classes\helloworldscene.cpp(189) : fatal error c1004: 发现意外的文件尾 1>main.cpp 1>tower.cpp 1>e:\learnprj\towerdefence\towerdefence\proj.win32\tower.cpp(2) : fatal error c1083: 无法打开包括文件:“cccontrolpotentiometer.h”: no such file or directory 1>towerbase.cpp 1>tinystr.cpp 1>tinyxml.cpp 1>tinyxmlerror.cpp 1>tinyxmlparser.cpp 1>正在生成代码... 1>生成日志保存在“file://e:\learnprj\towerdefence\towerdefence\proj.win32\debug.win32\buildlog.htm” 1>towerdefence.win32 - 111 个错误，0 个警告 ========== 生成: 成功 0 个，失败 1 个，最新 0 个，跳过 0 个 ==========

i have checked times ,but can not find faults. how can solve problem?