Compilare: user.cpp: In function ‘int main()’: user.cpp:17:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^ user.cpp:40:11: warning: array subscript is below array bounds [-Warray-bounds] m[q][q]=1; ^ user.cpp:40:8: warning: array subscript is below array bounds [-Warray-bounds] m[q][q]=1; ^