Compilare: main.cpp: In function 'int main()': main.cpp:22:21: warning: array subscript has type 'char' [-Wchar-subscripts] val[s[0]]=nr; ^ main.cpp:25:25: warning: array subscript has type 'char' [-Wchar-subscripts] if(list[s[0]]!="") break; ^ main.cpp:27:13: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(s[ind]!='=') ++ind; ++ind; ^~~~~ main.cpp:27:39: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' while(s[ind]!='=') ++ind; ++ind; ^~ main.cpp:28:21: warning: array subscript has type 'char' [-Wchar-subscripts] cnt[s[0]]=s[ind-3]-'a'+1; ^ main.cpp:29:22: warning: array subscript has type 'char' [-Wchar-subscripts] list[s[0]]=s.substr(ind, s.length()-ind+1); ^ main.cpp:37:42: warning: array subscript has type 'char' [-Wchar-subscripts] for(int j=cnt[functions.top()]-1; j>=0; --j){ ^ main.cpp:41:52: warning: array subscript has type 'char' [-Wchar-subscripts] numbers.push(solve(list[functions.top()])); ^ main.cpp:44:38: warning: array subscript has type 'char' [-Wchar-subscripts] else numbers.push(val[func[i]]); ^ main.cpp: In function 'll solve(std::__cxx11::string)': main.cpp:60:69: warning: array subscript has type 'char' [-Wchar-subscripts] if(func[i]>='0' && func[i]<='9') values.push(val[func[i]]); ^