Irrlicht Engine

how i can set Scite o Kdevelop?? I write the code but when i compile it i take this message >g++ -pedantic -Os -c test.cpp -o test.o test.cpp:1:22: error: irrlicht.h: No such file or directory test.cpp:41:2: warning: no newline at end of file test.cpp:2: error: 'irr' is not a namespace-name ... I mu...