Compilare: main.cpp: In function 'int main()': main.cpp:26:26: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | freq[a[i]]++; | ^ main.cpp:36:26: warning: array subscript has type 'char' [-Wchar-subscripts] 36 | freq[f[i]]--; | ^ main.cpp:42:22: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | freq[c[i]]--; | ^ main.cpp:46:25: warning: array subscript has type 'char' [-Wchar-subscripts] 46 | if(freq[d[i]] > 0) { | ^ main.cpp:47:26: warning: array subscript has type 'char' [-Wchar-subscripts] 47 | freq[d[i]]--; | ^