windows 语音：根据文字说语音

#define _USING_V110_SDK71_//vs 编译器一定要写这个宏，否则报错，还有就是sapi是c++的，只能用c++编译器编译
#include<sapi.h>
#include<stdio.h>
#include<sphelper.h>
int main(){

::CoInitialize(NULL);
ISpVoice *pSpVoice = NULL;
if(FAILED(CoCreateInstance(CLSID_SpVoice,NULL,CLSCTX_INPROC_SERVER,IID_ISpVoice,(void**)&pSpVoice))){
printf("Failed to create instance of ISpVoice!\n");
return -1;
}
pSpVoice->Speak(L"Hello,Windows NT",SPF_DEFAULT,NULL);
pSpVoice->Release();
::CoUninitialize();
printf("over");
return 0;
}