Compilare: main.cpp: In function 'void A(char)': main.cpp:9:29: warning: array subscript has type 'char' [-Wchar-subscripts] printf("%d ",p[i]); ^ main.cpp:15:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(u[i]==false) ^ main.cpp:16:20: warning: array subscript has type 'char' [-Wchar-subscripts] p[k]=i,u[i]=true,A(k+1),u[i]=false; ^ main.cpp:16:27: warning: array subscript has type 'char' [-Wchar-subscripts] p[k]=i,u[i]=true,A(k+1),u[i]=false; ^ main.cpp:16:44: warning: array subscript has type 'char' [-Wchar-subscripts] p[k]=i,u[i]=true,A(k+1),u[i]=false; ^ main.cpp: In function 'int main()': main.cpp:21:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("permutari.in","r",stdin),freopen("permutari.out","w",stdout),scanf("%c",&n),A(1); ^ main.cpp:21:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:21:94: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]