Compilare: user.cpp: In function ‘int main()’: user.cpp:4:30: warning: unused variable ‘n2’ [-Wunused-variable] {int n,minn,maxx,x,i,j,sum=0,n2; ^ user.cpp:9:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&minn,&maxx); ^ user.cpp:11:18: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,700000,f); ^