Compilare: user.cpp: In function ‘void kmp(char*, int*, char*)’: user.cpp:41:15: warning: unused variable ‘b’ [-Wunused-variable] int i, a, b; ^ user.cpp: In function ‘int main()’: user.cpp:79:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f, "%s", p); ^ user.cpp:81:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f, "%s", t); ^