Compilare: user.cpp: In function ‘int Fact(char, std::vector<int>&, int&)’: user.cpp:19:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(isdigit(mat[let][poz])){ ^ user.cpp:21:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(isdigit(mat[let][poz])){ ^ user.cpp:22:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans=ans*10+mat[let][poz]-'0'; ^ user.cpp:26:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(mat[let][poz]!='('){ ^ user.cpp:27:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans=v[mat[let][poz]-'a']; ^ user.cpp: In function ‘int Term(char, std::vector<int>&, int&)’: user.cpp:39:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(mat[let][poz]=='*'||mat[let][poz]=='/'){ ^ user.cpp:39:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(mat[let][poz]=='*'||mat[let][poz]=='/'){ ^ user.cpp:40:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(mat[let][poz]=='*'){ ^ user.cpp: In function ‘int E(char, std::vector<int>&, int&)’: user.cpp:53:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(mat[let][poz]=='+'||mat[let][poz]=='-'){ ^ user.cpp:53:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(mat[let][poz]=='+'||mat[let][poz]=='-'){ ^ user.cpp:54:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(mat[let][poz]=='+'){ ^ user.cpp: In function ‘int Exp()’: user.cpp:79:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] v.push_back(val[expr[pos]]); ^ user.cpp: In function ‘int main()’: user.cpp:109:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[let]=nr; ^ user.cpp:118:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] mat[let].push_back(ch); ^ user.cpp:121:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] mat[let].push_back('\n'); ^