Compilare: main.cpp: In function 'void update(trie*, char*, int)': main.cpp:19:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp:25:15: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | if(x->fiu[ch]==0) | ^~ main.cpp:27:16: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | x->fiu[ch]=new trie; | ^~ main.cpp:30:19: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | update(x->fiu[ch],c,k+1); | ^~ main.cpp: In function 'bool delte(trie*, char*, int)': main.cpp:35:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 35 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp:38:21: warning: array subscript has type 'char' [-Wchar-subscripts] 38 | if(delte(x->fiu[ch],c,k+1)==1) | ^~ main.cpp:40:16: warning: array subscript has type 'char' [-Wchar-subscripts] 40 | x->fiu[ch]=0; | ^~ main.cpp: In function 'int howmany(trie*, char*, int)': main.cpp:52:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 52 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp:55:15: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | if(x->fiu[ch]==0) | ^~ main.cpp:57:27: warning: array subscript has type 'char' [-Wchar-subscripts] 57 | return howmany(x->fiu[ch],c,k+1); | ^~ main.cpp: In function 'int prefix(trie*, char*, int)': main.cpp:62:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 62 | if(k==strlen(c) || x->fiu[ch]==0) | ~^~~~~~~~~~~ main.cpp:62:31: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | if(k==strlen(c) || x->fiu[ch]==0) | ^~ main.cpp:64:26: warning: array subscript has type 'char' [-Wchar-subscripts] 64 | return prefix(x->fiu[ch],c,k+1); | ^~