Compilare: user.cpp: In function ‘void adunare(char*, char*)’: user.cpp:17:9: warning: unused variable ‘l1’ [-Wunused-variable] int l1 = strlen(s1), l2 = strlen(s2); ^ user.cpp:17:26: warning: unused variable ‘l2’ [-Wunused-variable] int l1 = strlen(s1), l2 = strlen(s2); ^ user.cpp:18:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^