Compilare: main.cpp: In function 'int factor()': main.cpp:64:23: warning: array subscript has type 'char' [-Wchar-subscripts] 64 | return f[t[i++]]; | ~~~~~^ main.cpp: In function 'int main()': main.cpp:72:15: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(i=0; i<strlen(s); i++) | ~^~~~~~~~~~ main.cpp:115:11: warning: array subscript has type 'char' [-Wchar-subscripts] 115 | f[c]=1-f[c]; | ^ main.cpp:115:18: warning: array subscript has type 'char' [-Wchar-subscripts] 115 | f[c]=1-f[c]; | ^