Compilare: main.cpp: In function 'int main()': main.cpp:28:12: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | pr[c]=1-pr[c]; | ^ main.cpp:28:20: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | pr[c]=1-pr[c]; | ^ main.cpp:66:51: warning: array subscript has type 'char' [-Wchar-subscripts] 66 | while(k1>0 && pr[op[k1]]>=pr['a']) | ~~~~~^ main.cpp:85:55: warning: array subscript has type 'char' [-Wchar-subscripts] 85 | while(k1>0 && pr[op[k1]]>=pr['o']) | ~~~~~^ main.cpp:117:53: warning: array subscript has type 'char' [-Wchar-subscripts] 117 | var[++k2]=pr[s[j]]; | ~~~^ main.cpp:110:35: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else] 110 | if(s[j]!=' ') | ^