小编lak*_*ksh的帖子

我需要将Boost库添加到我的CMakeLists.txt中.你是怎么做的或如何添加它？

我需要在1.40版本中使用我的boost库.如何查看我的升级库版本？

我正在尝试编译PCL库,如http://pointclouds.org/downloads/source.html中所述.

我按照以下步骤操作:https://github.com/ShareKit/ShareKit/wiki/Installing-sharekit安装Sharekit.但我仍面临一些错误.我不知道如何解决这个问题.

错误:

Undefined symbols for architecture i386:
  "_ACAccountTypeIdentifierFacebook", referenced from:
      +[FBSession renewSystemAuthorization] in libShareKit.a(FBSession.o)
  "_ACFacebookAppIdKey", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_ACFacebookAudienceEveryone", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_ACFacebookAudienceFriends", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_ACFacebookAudienceKey", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_ACFacebookAudienceOnlyMe", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_ACFacebookPermissionsKey", referenced from:
      -[FBSession authorizeUsingSystemAccountStore:accountType:permissions:defaultAudience:isReauthorize:] in libShareKit.a(FBSession.o)
  "_OBJC_CLASS_$_ACAccountStore", referenced from:
      objc-class-ref in libShareKit.a(FBSession.o)
  "_OBJC_CLASS_$_ASIdentifierManager", referenced from:
      objc-class-ref in libShareKit.a(FBSettings.o)
  "_OBJC_CLASS_$_SLComposeViewController", referenced from:
      objc-class-ref in libShareKit.a(FBNativeDialogs.o)
  "_SLServiceTypeFacebook", referenced …

for(i = 0; i < 181; i++)
    {
       unsigned int index = rint(i/db);
        assert(index >= 0 && index < data.ranges_count);
      this->laser_ranges[i*2][0] = data.ranges[index] * 1e3;
    }

是什么意思 rint(i/db)？我不确定如何使用rint ...

我正在研究C++代码.不太确定下面的代码试图做什么.希望有人帮忙.

int pval = t_gamma[depth[i]];
        int lb = pval & 0xff;
        switch (pval>>8) {
            case 0:
                depth_mid[3*i+0] = 255;
                depth_mid[3*i+1] = 255-lb;
                depth_mid[3*i+2] = 255-lb;
                break;
            case 1:
                depth_mid[3*i+0] = 255;
                depth_mid[3*i+1] = lb;
                depth_mid[3*i+2] = 0;
                break;
            case 2:
                depth_mid[3*i+0] = 255-lb;
                depth_mid[3*i+1] = 255;
                depth_mid[3*i+2] = 0;
                break;
            case 3:
                depth_mid[3*i+0] = 0;
                depth_mid[3*i+1] = 255;
                depth_mid[3*i+2] = lb;
                break;
            case 4:
                depth_mid[3*i+0] = 0;
                depth_mid[3*i+1] = 255-lb;
                depth_mid[3*i+2] = 255;
                break;
            case 5:
                depth_mid[3*i+0] = 0;
                depth_mid[3*i+1] …

可能重复:
C++中_tmain()和main()有什么区别？

int _tmain(int argc,_TCHAR*argv [])和int main(int argc,char**argv)有什么区别？

我不清楚这种差异.