Borderou de evaluare (job #420286)

Compilare: user.cpp: In function ‘int main()’: user.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:22:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:25:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:29:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:32:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:40:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:57:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]