Borderou de evaluare (job #389409)

Compilare: user.cpp: In function ‘int main()’: user.cpp:13:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:69:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:72:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:8:34: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] user.cpp:8:41: warning: unused variable ‘j’ [-Wunused-variable] user.cpp:9:33: warning: unused variable ‘x1’ [-Wunused-variable]