Compilare: main.cpp: In function 'int main()': main.cpp:67:16: warning: array subscript has type 'char' [-Wchar-subscripts] fr[s[i]]++; ^ main.cpp:68:18: warning: array subscript has type 'char' [-Wchar-subscripts] fr1[s1[i]]++; ^ main.cpp:87:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=0; j<a; j++) ^~~ main.cpp:94:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' nr=nr0*fr[s1[b]]+nr1*fr1[s1[b]]; ^~ main.cpp:94:28: warning: array subscript has type 'char' [-Wchar-subscripts] nr=nr0*fr[s1[b]]+nr1*fr1[s1[b]]; ^ main.cpp:94:43: warning: array subscript has type 'char' [-Wchar-subscripts] nr=nr0*fr[s1[b]]+nr1*fr1[s1[b]]; ^ main.cpp:113:27: warning: array subscript has type 'char' [-Wchar-subscripts] nr=nr0*fr[s[b]]+nr1*fr1[s[b]]; ^ main.cpp:113:41: warning: array subscript has type 'char' [-Wchar-subscripts] nr=nr0*fr[s[b]]+nr1*fr1[s[b]]; ^