Compilare: user.cpp: In function ‘int main()’: user.cpp:29:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%hd", &n); ^ user.cpp:38:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%hd", &a[i][j]); ^ user.cpp:51:35: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%hd %hd\n", x, y); ^ user.cpp:51:35: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]