Borderou de evaluare (job #531283)

Compilare: user.cpp: In function ‘int main()’: user.cpp:45:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:67:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]