Compilare: user.cpp: In function ‘int main()’: user.cpp:187:9: warning: unused variable ‘lst’ [-Wunused-variable] int lst; ^ user.cpp:220:10: warning: unused variable ‘op’ [-Wunused-variable] char op; ^ user.cpp:180:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&k); ^ user.cpp: In function ‘void constr()’: user.cpp:132:25: warning: ‘lst’ may be used uninitialized in this function [-Wmaybe-uninitialized] rez[poz/2+1]=lst; ^