Compilare: user.cpp: In function ‘int main()’: user.cpp:28:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] D[i][j] = A[ S[i] ][ S[j] ]; ^ user.cpp:28:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] D[i][j] = A[ S[i] ][ S[j] ]; ^ user.cpp:33:72: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(D[i][j] > D[i+1][t-1] + D[t+1][j] + A[ S[i] ][ S[t] ]) ^ user.cpp:33:80: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(D[i][j] > D[i+1][t-1] + D[t+1][j] + A[ S[i] ][ S[t] ]) ^ user.cpp:34:73: warning: array subscript has type ‘char’ [-Wchar-subscripts] D[i][j] = D[i+1][t-1] + D[t+1][j] + A[ S[i] ][ S[t] ]; ^ user.cpp:34:81: warning: array subscript has type ‘char’ [-Wchar-subscripts] D[i][j] = D[i+1][t-1] + D[t+1][j] + A[ S[i] ][ S[t] ]; ^ user.cpp:15:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.in" ,"r", stdin ); ^ user.cpp:16:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.out","w", stdout); ^ user.cpp:18:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N ); ^ user.cpp:19:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", S+1); ^ user.cpp:23:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[i+'a'-1][j+'a'-1]); ^