Compilare: user.cpp: In function ‘int main()’: user.cpp:25:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] last[sir[i]][i] = i; ^ user.cpp:36:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[curr[i]] ++; ^ user.cpp:41:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (ap[sir[i]]) ^ user.cpp:42:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[sir[i]] --, economisesc ++; ^ user.cpp:49:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] j = last[curr[pos --]][j - 1]; ^ user.cpp:62:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[curr[i]] = 0; ^ user.cpp:12:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("mesaj2.in", "r", stdin); ^ user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("mesaj2.out", "w", stdout); ^ user.cpp:15:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (sir + 1); ^ user.cpp:28:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d\n", &N); ^ user.cpp:33:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (curr + 1); ^ /tmp/ccFVSAwh.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.