rj.cpp: In function `int main()': rj.cpp:16: warning: unused variable `int y' rj.cpp:16: warning: unused variable `int el' rj.cpp:16: warning: `int x1' might be used uninitialized in this function rj.cpp:16: warning: `int x2' might be used uninitialized in this function rj.cpp:16: warning: `int y1' might be used uninitialized in this function rj.cpp:16: warning: `int y2' might be used uninitialized in this function