Compilare: user.cpp: In function ‘int main()’: user.cpp:19:28: warning: unused variable ‘cj’ [-Wunused-variable] int r, c, nr, i, j, q, cj, ci, l, cl; ^ user.cpp:19:32: warning: unused variable ‘ci’ [-Wunused-variable] int r, c, nr, i, j, q, cj, ci, l, cl; ^ user.cpp:21:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &r, &c); ^ user.cpp:25:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr); ^