Compilare: user.cpp: In function ‘int main()’: user.cpp:31:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i=1;i<13;++i) al[c[i]]=i; ^ user.cpp:35:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int j=0;j<5;++j) s[i].b[j]=al[aux[j]]; ^ user.cpp:46:86: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i=1;i<=n;++i,printf("\n")) for (int j=0;j<5;++j) printf("%c",c[s[i].b[j]]); ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.in","r",stdin); ^ user.cpp:29:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d\n",&ok,&n); ^ user.cpp:30:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",c+1); ^ user.cpp:34:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",aux); ^ user.cpp:38:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zimeria.out","w",stdout); ^