pod.cpp: In function `int main()': pod.cpp:4: warning: unused variable `int cate' pod.cpp:4: warning: unused variable `int c' pod.cpp:4: warning: unused variable `int poz' pod.cpp:4: warning: unused variable `int max' pod.cpp:4: warning: unused variable `int pp' pod.cpp:33: warning: `int t' might be used uninitialized in this function