Compilare: user.cpp: In function ‘int main()’: user.cpp:31:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] m[i][1][m[i][1][0]]=aux%10; ^ user.cpp:33:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] m[i][i][m[i][i][0]]=aux%10; ^ user.cpp:24:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.in", "r", stdin); ^ user.cpp:25:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.out", "w", stdout); ^ user.cpp:26:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^