Compilare: main.cpp: In function 'int main()': main.cpp:25:11: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | F[c]=1-F[c]; | ^ main.cpp:25:18: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | F[c]=1-F[c]; | ^ main.cpp: In function 'int factor()': main.cpp:70:20: warning: array subscript has type 'char' [-Wchar-subscripts] 70 | return F[ t[i++] ]; | ~~~~~^ main.cpp:72:12: warning: 'r' may be used uninitialized [-Wmaybe-uninitialized] 72 | return r; | ^ main.cpp:59:9: note: 'r' was declared here 59 | int r; | ^ In function 'int op_xor()', inlined from 'int op_and()' at main.cpp:44:22, inlined from 'int op_or()' at main.cpp:35:22: main.cpp:53:10: warning: 'r' may be used uninitialized [-Wmaybe-uninitialized] 53 | r=(r^factor()); | ~^~~~~~~~~~~~~ main.cpp: In function 'int op_or()': main.cpp:59:9: note: 'r' was declared here 59 | int r; | ^ main.cpp: In function 'int op_xor()': main.cpp:53:10: warning: 'r' may be used uninitialized [-Wmaybe-uninitialized] 53 | r=(r^factor()); | ~^~~~~~~~~~~~~ main.cpp:59:9: note: 'r' was declared here 59 | int r; | ^ In function 'int op_xor()', inlined from 'int op_and()' at main.cpp:44:22: main.cpp:53:10: warning: 'r' may be used uninitialized [-Wmaybe-uninitialized] 53 | r=(r^factor()); | ~^~~~~~~~~~~~~ main.cpp: In function 'int op_and()': main.cpp:59:9: note: 'r' was declared here 59 | int r; | ^