How to fix such kind of error

I am following tutorial

Open a Web Site and Display Toast on Target Detection

but while running ndk-build it show such kind of error

"Compile++ arm : ImageTargets <= ImageTargets.cpp

jni/ImageTargets.cpp: In function 'void Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargetsRenderer_renderFrame(JNIEnv*, jobject)':

jni/ImageTargets.cpp:588:29: error: 'lt' was not declared in this scope

jni/ImageTargets.cpp:588:39: error: 'class QCAR::State' has no member named 'getNumActiveTrackables'

jni/ImageTargets.cpp:588:63: error: expected ')' before ';' token

jni/ImageTargets.cpp:588:65: error: name lookup of 'tIdx' changed for ISO 'for' scoping [-fpermissive]

jni/ImageTargets.cpp:588:65: note: (if you use '-fpermissive' G++ will accept your code)

jni/ImageTargets.cpp:588:71: error: expected ';' before ')' token

jni/ImageTargets.cpp:960:1: error: expected '}' at end of input

jni/ImageTargets.cpp: At global scope:

jni/ImageTargets.cpp:960:1: error: expected '}' at end of input

make: *** [obj/local/armeabi/objs/ImageTargets/ImageTargets.o] Error 1