Compilare: user.cpp: In function ‘int main()’: user.cpp:8:13: warning: unused variable ‘j’ [-Wunused-variable] int n,i,j,max,max1,prod; ^ user.cpp:11:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.cpp:14:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&a[i],&b[i]); ^