Compilare: user.cpp: In function ‘void read()’: user.cpp:46:27: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] fscanf(in,"%d",&A[i][j]); ^ user.cpp: In function ‘void exec()’: user.cpp:157:40: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(out,"%d",A[pos_f.x][pos_f.y]); ^ user.cpp: In function ‘void read()’: user.cpp:39:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:46:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&A[i][j]); ^ user.cpp:53:59: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d%d",&pos_i.x,&pos_i.y,&pos_f.x,&pos_f.y); ^