追加一句:那个字符串路径有几条所以输完一个之后用分号(;)隔开,也就是下面这样(举个例子):
C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin;C:\Program Files\Microsoft Visual Studio\VC98\BIN;C:\Program Files\Microsoft Visual Studio\Common\TOOLS;C:\Program Files\Microsoft Visual Studio\Common\TOOLS\WINNT
C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin;C:\Program Files\Microsoft Visual Studio\VC98\BIN;C:\Program Files\Microsoft Visual Studio\Common\TOOLS;C:\Program Files\Microsoft Visual Studio\Common\TOOLS\WINNT