Compilare: main.cpp: In function 'int main()': main.cpp:43:18: warning: array subscript has type 'char' [-Wchar-subscripts] var[car]=!var[car]; ^ main.cpp:43:28: warning: array subscript has type 'char' [-Wchar-subscripts] var[car]=!var[car]; ^ main.cpp:57:39: warning: array subscript has type 'char' [-Wchar-subscripts] st2[++k2]=var[s[i]]; ^ main.cpp:68:57: warning: array subscript has type 'char' [-Wchar-subscripts] while(k1>0&&pr[st1[k1]]>=pr[s[i]]) ^ main.cpp: In function 'int op(char)': main.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type] } ^