Compilare: user.cpp: In function ‘void make_prefix()’: user.cpp:20:9: warning: unused variable ‘i’ [-Wunused-variable] int i,q = 0; ^ user.cpp: In function ‘void make_match()’: user.cpp:32:9: warning: unused variable ‘i’ [-Wunused-variable] int i,q = 0; ^ user.cpp: In function ‘void read()’: user.cpp:12:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%s",A + 1, B + 1); ^ user.cpp: In function ‘int main()’: user.cpp:57:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:58:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^