Compilare: main.cpp: In function 'int main()': main.cpp:48:23: warning: array subscript has type 'char' [-Wchar-subscripts] if(val[var[ii]]==0) ^ main.cpp:49:24: warning: array subscript has type 'char' [-Wchar-subscripts] val[var[ii]]=1; ^ main.cpp:51:24: warning: array subscript has type 'char' [-Wchar-subscripts] val[var[ii]]=0; ^ main.cpp:70:41: warning: array subscript has type 'char' [-Wchar-subscripts] st1[++k1]=val[aux[0]]; ^ main.cpp:100:45: warning: array subscript has type 'char' [-Wchar-subscripts] while(k2>0&&k1>0&&pr[st2[k2]]>=pr[s[i]]) ^ main.cpp:100:55: warning: array subscript has type 'char' [-Wchar-subscripts] while(k2>0&&k1>0&&pr[st2[k2]]>=pr[s[i]]) ^ main.cpp: In function 'int eval(int, int, char)': main.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^