Compilare: main.cpp: In function 'int main()': main.cpp:49:45: warning: variable 'stg' set but not used [-Wunused-but-set-variable] int k , i , j , dif , p2 , elem , now , stg , dr; ^~~ main.cpp:49:51: warning: variable 'dr' set but not used [-Wunused-but-set-variable] int k , i , j , dif , p2 , elem , now , stg , dr; ^~ main.cpp:51:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&k); ^