Compilare: main.cpp: In function 'int nt(int)': main.cpp:26:9: warning: unused variable 'i' [-Wunused-variable] int i=0, r=0; ^ main.cpp: In function 'int main()': main.cpp:73:41: warning: array subscript has type 'char' [-Wchar-subscripts] while (k1>0 &&( pr[ st1[k1] ] > pr[s[i]] || (pr[st1[k1]]==pr[s[i]] && (s[i]=='+' || s[i]=='/')))) { ^ main.cpp:73:52: warning: array subscript has type 'char' [-Wchar-subscripts] while (k1>0 &&( pr[ st1[k1] ] > pr[s[i]] || (pr[st1[k1]]==pr[s[i]] && (s[i]=='+' || s[i]=='/')))) { ^ main.cpp:73:68: warning: array subscript has type 'char' [-Wchar-subscripts] while (k1>0 &&( pr[ st1[k1] ] > pr[s[i]] || (pr[st1[k1]]==pr[s[i]] && (s[i]=='+' || s[i]=='/')))) { ^ main.cpp:73:78: warning: array subscript has type 'char' [-Wchar-subscripts] while (k1>0 &&( pr[ st1[k1] ] > pr[s[i]] || (pr[st1[k1]]==pr[s[i]] && (s[i]=='+' || s[i]=='/')))) { ^ main.cpp: In function 'int operatie(char, int, int)': main.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type] } ^