Compilare: user.cpp: In function ‘int main()’: user.cpp:20:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < strlen(q); ++i ){ ^ user.cpp:23:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[q[i]]++; ^ user.cpp:14:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp:14:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d; ^ user.cpp:11:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere.in","r",stdin); ^ user.cpp:12:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere.out","w",stdout); ^ user.cpp:17:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%*c",&n); ^ user.cpp:18:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",q); ^