Compilare: main.cpp: In function 'int eval(int)': main.cpp:48:39: warning: array subscript has type 'char' [-Wchar-subscripts] while(k2>0&&pr[st2[k2]]>=pr[s[i]]) ^ main.cpp:48:49: warning: array subscript has type 'char' [-Wchar-subscripts] while(k2>0&&pr[st2[k2]]>=pr[s[i]]) ^ main.cpp:63:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:73:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(s[k]>='0'&&s[k]<='9') ^~~~~ main.cpp:74:33: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' a=a*10+s[k]-'0',k++;k++; ^ main.cpp:75:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(s[k]>='0'&&s[k]<='9') ^~~~~ main.cpp:76:33: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' b=b*10+s[k]-'0',k++;k++; ^