puncte.cpp: In function `void bt(long int)': puncte.cpp:21: warning: comparison between signed and unsigned integer expressions puncte.cpp:26: warning: comparison between signed and unsigned integer expressions puncte.cpp:41: warning: comparison between signed and unsigned integer expressions puncte.cpp:43: warning: comparison between signed and unsigned integer expressions puncte.cpp:57: warning: comparison between signed and unsigned integer expressions puncte.cpp:59: warning: comparison between signed and unsigned integer expressions puncte.cpp: In function `int main()': puncte.cpp:90: warning: comparison between signed and unsigned integer expressions puncte.cpp:69: warning: unused variable `long int j'