Compilare: main.cpp: In function 'int main()': main.cpp:27:39: warning: unused variable 'nr2' [-Wunused-variable] int c , l , elem , i , nr , num , nr2 , num2 , cnt; ^~~ main.cpp:27:45: warning: unused variable 'num2' [-Wunused-variable] int c , l , elem , i , nr , num , nr2 , num2 , cnt; ^~~~ main.cpp:27:52: warning: unused variable 'cnt' [-Wunused-variable] int c , l , elem , i , nr , num , nr2 , num2 , cnt; ^~~ main.cpp:28:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&c,&l); ^