Compilare: main.cpp: In function 'int main()': main.cpp:96:19: warning: unused variable 'n2' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~ main.cpp:96:24: warning: unused variable 'elem' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~~~ main.cpp:96:37: warning: unused variable 'lin' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~~ main.cpp:96:43: warning: unused variable 'col' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~~ main.cpp:96:57: warning: unused variable 'lat' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~~ main.cpp:96:63: warning: unused variable 'aux' [-Wunused-variable] int st , dr , n2 , elem , poz , lin , col , j , i , lat , aux; ^~~ main.cpp:97:15: warning: unused variable 'cftot' [-Wunused-variable] long long cftot; ^~~~~ main.cpp:99:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^