Compilare: user.cpp: In function 'void adunare(int, int)': user.cpp:9: warning: comparison between signed and unsigned integer expressions user.cpp:12: warning: comparison between signed and unsigned integer expressions user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp:8: warning: unused variable 'k' user.cpp: In function 'int main()': user.cpp:33: warning: comparison between signed and unsigned integer expressions user.cpp:35: warning: comparison between signed and unsigned integer expressions user.cpp:37: warning: comparison between signed and unsigned integer expressions