Borderou de evaluare (job #419809)

Compilare: user.cpp: In function ‘int main()’: user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:39:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:39:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:42:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:51:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:51:9: warning: ‘k’ may be used uninitialized in this function [-Wuninitialized]