Compilare: main.c: In function 'main': main.c:15:25: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration] 15 | if(s[0]=='*' && strlen(s)==2) | ^~~~~~ main.c:15:25: warning: incompatible implicit declaration of built-in function 'strlen' main.c:3:1: note: include '<string.h>' or provide a declaration of 'strlen' 2 | #include <stdlib.h> +++ |+#include <string.h> 3 | main.c:18:12: warning: incompatible implicit declaration of built-in function 'strlen' 18 | if(strlen(s)==strlen(t)) | ^~~~~~ main.c:18:12: note: include '<string.h>' or provide a declaration of 'strlen' main.c:29:27: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | if(v[t[j]]==0)nr++,v[t[j]]=1; | ~^~~ main.c:29:43: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | if(v[t[j]]==0)nr++,v[t[j]]=1; | ~^~~