Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘iant’ [-Wunused-variable] int n,i,iant,an,x,dif,dtm,a1; ^ user.cpp:9:18: warning: unused variable ‘an’ [-Wunused-variable] int n,i,iant,an,x,dif,dtm,a1; ^ user.cpp:9:21: warning: unused variable ‘x’ [-Wunused-variable] int n,i,iant,an,x,dif,dtm,a1; ^ user.cpp:9:23: warning: unused variable ‘dif’ [-Wunused-variable] int n,i,iant,an,x,dif,dtm,a1; ^ user.cpp:9:27: warning: unused variable ‘dtm’ [-Wunused-variable] int n,i,iant,an,x,dif,dtm,a1; ^ user.cpp:10:17: warning: unused variable ‘sum’ [-Wunused-variable] long long s,sum; ^ user.cpp:11:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:14:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^