Compilare: user.cpp: In function ‘int main()’: user.cpp:52:21: warning: variable ‘e’ set but not used [-Wunused-but-set-variable] int n,i,j,t,sol,e,x; ^ user.cpp:53:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^ user.cpp:55:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (a[i]+1,DIM,fin); ^